Yaesu FTM-6000R User manual

Product Reviews
August 2022
COMPACtenna 2M/440+

www.arrl.org QST August 2022 39
Reviewed by Rick Palm, K1CE
[e-mail]
The Yaesu FTM-6000R is a compact, dual-band, one
band at a time, analog (FM) mobile transceiver. The
maximum RF output power is 50 W on both the
2-meter and 70-centimeter bands, but it also
has a signicant extended range on receive,
from 108 MHz to 999.995 MHz (with cellular
blocked; see Table 1). The control head is
detachable and can be connected to the main unit
remotely using the included 10-foot cable.Yaesu also
includes a control head mounting bracket, a radio main
unit mounting bracket, a USB cable, a dc power cable,
and a DTMF microphone (SSM-85D). The radio can
support Bluetooth wireless with the optional BU-4 unit.
There are 1,100 programmable memory channels.
Programmable scanning functions include the VFO
scan, memory scan, and Primary Memory Group
(PMG) scan. A 3 W audio power speaker provides
good, loud audio output. The unit features a Funnel
Air-Convection Conductor (Wind Tunnel) that gathers
cool air from the front and side intakes and directs it to
the radio nal amplier, and out of the unit through the
fan located on the rear panel (see Figure 1).
A new Easy to Operate – III (E2O-III) system imple-
ments a three-tier list that calls up the function settings
in order of the frequency of priority and use. The PMG
allows calling up a group of registered frequencies
regardless of the band. A Memory Auto Grouping
(MAG) calls up memory channels that are automati-
cally categorized in each band for quick and easy
recall.
Basic Operation
The radio turns on by pressing and holding the
POWER/LOCK switch located in the upper left-hand por-
tion of the controller. Press and hold it again to turn off
the radio. Adjust the volume by rotating the VOL knob
just below the POWER/LOCK switch. To adjust the
squelch level, push the SQL/BACK key in the upper
right-hand corner of the control head, and turn the
Product Review
Bottom Line
The FTM-6000R may look like a basic dual-
band mobile radio, but it’s not. The new
operating features were implemented with
the operators in mind, and that’s where the
technical advancements reside.
Pascal Villeneuve, VA2PV , [email protected]
Yaesu FTM-6000R VHF/UHF Mobile
Transceiver
DIAL knob below it to mute the background noise.
Pushing the SQL/BACK key again (or waiting 2 sec-
onds) will return the SQL level screen to the normal
operating screen.
To select a frequency band, press the BAND GRP key
repeatedly to cycle through ve band choices.
Unwanted frequency bands can be set so they are not
displayed on the rotation of bands.To tune to a specic
frequency, the DIAL knob on the right-hand side of the
controller changes the frequency. To change the fre-
quency in 1 MHz steps, press the DIAL knob rst, then
rotate it to the desired frequency. To change the fre-
quency in 5 MHz steps, press the DIAL knob and hold
down while rotating the knob.You can also press the
numeric keys on the microphone to select a frequency.
For transmission, press the standard microphone PTT
button. If it is pressed when a non-amateur band is
selected, an alarm sounds, INHBT (inhibit) is displayed
on the screen, and transmission is disabled. According

40 August 2022 QST www.arrl.org
Table 1
Yaesu FTM-6000R, serial number 1L020743,
FCC ID# K6620795X40
Manufacturer’s Specifications Measured in ARRL Lab
Frequency coverage: Receive, Receive: 108 – 823.995, 849.1 –
108 – 999.995 MHz (cellular blocked); 868.995, 894.1 – 938.295, 965.2 –
transmit, 144 – 148, 430 – 450 MHz. 983.295 MHz. Transmit: as specied.
Modes: FM, FM-N (FM-Narrow), As specied.
AM (receive only).
Power requirements: Transmit, 10 A at 50 W At 13.8 V dc: Receive, no signal, max.
RF output; receive, 0.5 A at 13.8 V dc. audio and backlights, 510 mA; lights at
(No operating voltage range was specied.) min, 275 mA. Power off, <0.1 mA.
Transmit (hi/med/low):
146 MHz, 7.2/5.2/2.7 A;
440 MHz, 9.5/6.1/2.9 A.
Receiver Receiver Dynamic Testing*
Sensitivity: FM 12 dB SINAD: 137 – FM 12 dB SINAD: 146 MHz, 0.15 µV;
150 MHz, 0.2 µV; 150 – 174 MHz, 0.25 µV; 223 MHz, 0.42 µV; 440 MHz,
174 – 222 MHz, 0.3 µV; 222 – 300 and 0.13 µV; 902 MHz, 0.21 µV.
336 – 420 MHz, 0.25 µV; 420 – 520 MHz, AM: 120 MHz, 0.74 µV.
0.2 µV; 800 – 900 MHz, 0.4 µV; 900 –
999.99 MHz, 0.8 µV. AM: 10 dB S/N,
108 – 137, 300 – 336 MHz, 0.8 µV.
FM two-tone, third-order IMD dynamic 20 kHz offset: 146 MHz, 68 dB,†
range: Not specied. 440 MHz, 67 dB;†10 MHz offset:
146 MHz, 82 dB, 440 MHz, 83 dB.
FM two-tone, second-order IMD dynamic 146 MHz, 89 dB; 440 MHz, 111 dB.†
range: Not specied.
Adjacent-channel rejection: Not specied. 20 kHz offset: 146 MHz, 68 dB;†
440 MHz, 67 dB.†
Squelch sensitivity: Not specied. At threshold: 146 MHz and 440 MHz,
0.11 µV, 0.28 µV (maximum).
S-meter sensitivity: Not specied. For 5 bars: 146 MHz, 1.7 µV; 440 MHz,
1.5 µV.
Audio output power: 3 W into 8 Ωat 2.9 W; THD at 1 VRMS, 3.3%.
10% THD.
Transmitter Transmitter Dynamic Testing
Power output: High/medium/low power, At 13.8 V dc, high/medium/low power:
50/25/5 W. 146 MHz, 49/24/5.1 W;
440 MHz, 55/28/5.5 W.
Spurious signal and harmonic suppression: 146 MHz and 440 MHz, >70 dB.
≥60 dB. Meets FCC requirements.
Transmit-receive turnaround time (PTT Squelch on, S-9 signal: 146 MHz and
release to 50% of full audio output): 440 MHz, 25 – 60 ms.††
Not specied.
Receive-transmit turnaround time (tx delay): 146 MHz and 440 MHz, 43 ms.
Not specied.
Size (height, width, depth): Control head: 1.6 × 5.51 × 1.38 inches, without knob.
Radio body: 1.66 × 5.47 × 5.2 inches, without fan.
Weight 2.43 pounds (radio body, control head, and control cable).
*Test results shown are for standard FM mode. Sensitivity, adjacent channel selectivity,
and dynamic range increased by 1 dB in FM narrow mode.
†Measurement was noise limited at the value indicated. See the Lab Notes on page 43.
††Timing uctuated over this range. The turnaround times are faster than most transceivers,
so this should present no problems in typical use.
KEY:
* Noise limited at value shown.
Measurements in FM mode.
QS2208-PR161
Snd 41
Audio Output (W)
2.9
ChRej
50 90
Adjacent Channel Rejection (dB)
70 cm 67
2 m 68
I3
RX 40 70
Receiver Third-Order Dynamic Range (dB)
(20 kHz offset)
70 cm 67*
2 m 68*
I3
RX 60 90
Receiver Third-Order Dynamic Range (dB)
(10 MHz offset)
70 cm 83
2 m 82
SINAD
0.25 0.1
Receiver Sensitivity (12 dB SINAD, µV)
70 cm 0.13
2 m 0.15
Yaesu FTM-6000R
Key Measurements Summary
to the manual, if transmission is con-
tinued for a long period of time, the
radio overheats and the high tem-
perature protection function is acti-
vated. The power output level is
automatically reduced to the low
power setting. If transmission con-
tinues with the high temperature
protection function engaged, the
radio will forcibly return to the
receive state, a feature that is appre-
ciated when the transmitter remains
engaged without the knowledge of
the operator (which happens occa-
sionally in the eld — for example,
when an operator accidentally

www.arrl.org QST August 2022 41
pushes or sits on the microphone’s PTT button). For the
purpose of this review, this feature was not tested.
To lock the keys and DIAL knob, press the POWER/
LOCK key briey. The word LOCK will display on the
screen. The PTT button and the VOL knob cannot be
locked. Pressing the POWER/LOCK button again will
unlock the system, and the word UNLOCK will appear
briey on the screen. If you are unaware that the
system is locked, an error message will appear on the
screen when the PTT button is pushed. For example,
LOCK is a reminder that the system is locked and
needs to be unlocked prior to changing frequency.
The E2O-III System for
Assigning Functions and Settings
The E2O-III provides a three-tier system of operating
modes for assigning functions and settings, such as
the CTCSS tone frequency. There are three lists of
functions in order of frequency and priority of use. The
Menu list contains all settings and functions not regis-
tered to the next level (the frequently used Function
list). Thus, the Menu list contains all of the settings that
are of the “set and forget” type, such as the micro-
phone gain setting. To view the Menu list, hold down
the F/MENU button while rotating the dial to cycle
through the items.
The Function list contains the settings that are more
frequently used, such as the CTCSS tone frequency,
plus or minus frequency shift for repeater use, and
repeater reverse (which ips the receive frequency to
the transmit frequency, allowing access to the repeater
incoming signal strength and readability on the repeat-
er’s input frequency — information used to set up a
simplex communication off the repeater frequency, for
example).
Figure 1 — The Yaesu
FTM-6000R rear panel.
To register (move) a frequently used function or setting
to the Function list, select the function or item from
the Menu list and then press and hold the F/MENU key.
It is then moved to the Function list. To cancel a func-
tion’s registration on the Function list, select it and then
press and hold the SQL BACK key; the function is then
moved back to the Menu list. To call up a function in
the Function list, press the F/MENU button momentarily,
and then rotate the DIAL knob to the desired function/
setting.
Lastly, the F1 key calls up the one function that is the
highest priority for the individual operator. Examples
include “Home” (the operator’s home repeater) or the
CTCSS tone frequency selection setting (if the oper-
ator travels out of their home area frequently). From
the Function list, select the desired function/setting,
and then press and hold the F1 key. Then, all you have
to do is push the F1 key briey to pull up your home
repeater, for example.You can readily change the
assignment of the F1 key by selecting another function/
setting from the Function list and then pressing and
holding down the F1 key. Figure 2 shows a diagram
representing the layered structure of the E2O-III
system.
MAG (Memory Auto Grouping)
Memory channels can be grouped and recalled by
band. When you press the BAND GRP key while the
radio is in memory mode, the bands switch from air,
VHF, UHF to all memory channels. Then, only the
memory channels in the selected band can be
recalled, for efficient memory channel selection. For
example, I programmed three local repeaters into
memory channels, and an active local aircraft fre-

42 August 2022 QST www.arrl.org
Figure 2 — This diagram represents the layered structure of the E2O-III system. [Graphic courtesy of Yaesu]
quency (118.175 MHz). Pressing the BAND GRP key
brought up the air band memory channel. Pressing it
again brought up the VHF band memory channels with
my three local repeater memory channels.
PMG (Primary Memory Group)
Frequently used frequencies and up to ve memory
channels that have been programmed into the PMG
can be displayed for easy selection/operation. For
example, if 25 memory channels are programmed into
the radio, up to ve of them can be registered in the
PMG. I registered three repeater channels in the PMG.
Subsequently, when I pressed the PMG PW button, only
those three repeater channels were available to cycle
through and use, adding another aspect to the efficient
operation.
VFO Band Skip
Also adding to the efficient operation, unused bands
can be skipped in the rotation of bands. For example, if
you have no need for monitoring the air band, you can
skip it by selecting the BND.SEL (band select) function
in the main Menu list and changing its state to OFF .
Other Functions
The frequency and other parameters in a memory
channel can be transferred into the VFO register by
simply pressing and holding the SQL/BACK key while
the memory channel is displayed.
Scanning
The radio supports the following scanning functions:
VFO scan, memory channel scan, PMG scan, and
Programmable Memory Scan (PMS). To nd active
frequencies, press the V/M MW key to switch to VFO
mode or memory mode, or press the PMG PW key for
the PMG mode, and then press and hold the micro-
phone UP or DWN button to start scanning up or down.
When the VFO scan is active, VFO.SCN appears on the
screen. MEM.SCN appears during a memory scan, and
PMG.SCN appears during a PMG scan. Turn the DIAL
knob and scanning will move up or down in frequency
based on the direction of the knob rotation. When a
busy frequency comes up, the scan pauses, the fre-
quency ashes, and the scan starts again after 3 sec-
onds (other options are discussed below). Press the
PTT switch or UP or DWN button to cancel the scanning.
If the scan has paused on a busy frequency, rotate the
DIAL knob to resume scanning.
PMS (Programmable Memory Scan)
The PMS function scans only the range of frequencies
between the lower and upper limits set by the user
in a pair of PMS programmable memory channels.
Fifty pairs of frequencies (L01/U01 to L50/U50) are
available.
To resume scanning after the scan stops on a busy
frequency, bring up the SCN.TYP (scan type) function in
the Menu list. Use the SCN.RSM (scan resume) func-
tion to select what happens. BUSY means the signal is
received until the signal fades out, and after two sec-
onds, scanning resumes. HOLD means scanning stops
and does not resume. 1 SEC / 3 SEC / 5 SEC means the
signal is received for a specied time, and then scan-
ning resumes. Each memory channel can be selected
to be skipped during a memory scan.

www.arrl.org QST August 2022 43
The Basic Manual
Despite the common tendency of many hams
(including myself) to intuitively operate a radio without
reading the manual, I recommend studying the basic
manual for this radio, as you will learn its wide range of
functioning.A good example of this is the scanning
function. I tried a VFO scan, and the screen display
read VFO.SCN . Although it seemed like it wasn’t worki-
ng, it was, and a frequency would not pop up until the
scan came across an active frequency. Traditional
scanning usually involves the rapid increase or
decrease of the actual frequency numbers being
scanned. The manual explains this well.
The basic operating manual is well written and suc-
cinct, and it includes large graphics showing which
buttons to push or dials to rotate. It is in large print,
good for my 70-year-old eyes. The manual is 40 pages,
but that includes all of the ne print that no one ever
reads!
The Advanced Manual
(for Advanced Features)
The supplied basic manual covers more than needed
to get started with this radio. The radio’s advanced
manual (available for download under the product
heading on the Yaesu website) covers more advanced
operations in detail: selecting squelch type, scanning
for the CTCSS frequency, Digital Code Squelch (DCS)
operation, Enhanced Paging and Code Squelch
(EPCS), DTMF operation, Dual Watch feature,
weather broadcast channels and functions, Automatic
Range Transponder System (ARTS), and a complete
explanation of every Menu list function. Additionally, a
10-pin data port on the rear panel allows connection of
a terminal node controller (TNC) for packet operation.
It can also be used to access the Yaesu WIRES-X net-
work as an analog node when connected to an HRI-
200, and this is discussed in the advanced manual.
Conclusion
This is a solid, basic but feature-laden, compact, high-
power, dual-band FM mobile transceiver that is mod-
estly priced. The ultimate litmus test for any product
review is whether or not the reviewer would consider
purchasing the product themselves. In my case, I am
purchasing one for my vehicle.
Manufacturer:Yaesu USA, 6125 Phyllis Dr., Cypress,
CA 90630; www.yaesu.com. Price: FTM-6000R,
$320.
Lab Notes: Yaesu FTM-6000R
In measuring dynamic range, lab tests put strong
o󰀨-channelsignalsintoareceiverinputandlookfor
unwantedresponses.Thedi󰀨erencebetweenthe
noiseoorofareceiverandthelevelofo󰀨-channel
signalsthatcauseunwantedreceiverresponses
isgenerallyknownas“dynamicrange,”typically
expressed in dB. The higher the dynamic range, the
betterthereceiver.Oneunwantedresponsecanbe
intermodulationbetweentwoormoreo󰀨-channel
signals, causing a mix of those two signals to appear
inthereceiverpassband.Anotherunwantede󰀨ectcan
beforthereceivertolosegain,e󰀨ectivelydecreasing
itssensitivity.Thedynamicrangeofareceivercan
alsobelimitedbythephasenoiseofthereceiver
internal oscillators. When this noise predominates, the
measurement is reported to be noise limited at the
valueshown.Areceivermeasurementbeing“noise
limited”isnotanydi󰀨erentfromanyoftheother
e󰀨ects,soanoise-limiteddynamicrangemeasure-
mentisstillavalidmeasurementofthereceiver’s
dynamicrange.Whatcountsistheactualnumber.A
receiverthatisnoiselimitedat80dBofdynamicrange
isjustasgoodasareceiverthathasgaincompression
measuredat80dB.Infact,ifthedesignofthereceiver
is robust, the gain compression performance could be
sogoodthatalowlevelofphasenoisedominates.
What counts is the dynamic-range number, not the
actual cause of the dynamic-range limit. — Ed Hare,
W1RFI, ARRL Lab Manager
Impressions
Just when you think the ubiquitous dual-band VHF/
UHF FM synthesized transceiver can’t be improved
upon over its 45-year history, along comes the
FTM-6000R. Much of the evolution of these radios
involves improvement of the human operator interface,
and the FTM-6000R is no exception. I especially like
the E2O-III algorithm for assigning functions and
settings.
There is plenty of audio output from the small speaker,
which res straight up. Audio quality reports from
repeater users have been ne. I’ve never seen a MUTE
button on any microphone keypad before this one, but
it seems like a convenience when needing to quiet the
radio instantly. The microphone ts comfortably in the
hand. I like that if I were to accidentally sit on the micro-
phone and cause transmission, the radio’s protocol is
to force the receiver.

44 August 2022 QST www.arrl.org
Radio Analog PTRX-9700 SDR Adapter
Add-On
Bottom Line
The PTRX-9700 is a high-quality add-on for the
IC-9700 that provides an easy way to integrate
an external SDR receiver, opening the possi-
bility to demodulate 90 kHz of a band simulta-
neously or monitor two in-band frequencies at
once, using your choice of SDR software.
Reviewed by Rus Healy, K2UA
[e-mail]
Like its HF sibling (the IC-7300) has done on 160 –
6 meters, Icom’s IC-9700 has taken the VHF/UHF
world by storm. The IC-9700 covers the 144 – 148, 430
– 450, and 1240 – 1300 MHz amateur radio bands. It
also shares the form factor, intuitive front panel layout,
multifunction display, and many other features that
make the IC-7300 so popular. The IC-9700 has quickly
become the go-to radio for many serious VHF/UHF
operators, including those who operate the most
demanding modes, such as EME.
In early 2020, I found a great deal on a new IC-9700.
This radio quickly replaced the high-performance
transverters I had been using for all three bands for
several years. It’s seen service in VHF contests, por-
table operations such as the microwave sprints, day-
to-day MSK144 meteor scatter activity on 2 meters,
and JT65 and Q65 EME operations on 144, 432, and
1296 MHz. It’s a radio that does many things quite
well, and despite its small size, relatively spartan front-
panel control layout, and limited rear-panel control
capabilities, it has drawn in many demanding
operators.
Turbocharging the IC-9700 Receiver
Radio Analog rst developed enhanced SDR function-
ality for the IC-7300 and followed that up with the
PTRX-9700 for the IC-9700. Fundamentally, the
PTRX-9700 allows for the connection of an external
SDR to the IC-9700. Installing this product is a simple,
nonintrusive, and easily reversible change to the radio.
The PTRX-9700 uses the existing 10 MHz reference
input (SMA) connector on the radio’s rear panel, along
with a splitter provided with the kit, to allow that con-
nector to be used for its original function and the SDR
output.You attach an SDR of your choosing to the
IC-9700 to reap the benets of SDR receiver operation
in parallel with the IC-9700’s own receiver.
Why might you want to add an SDR to the IC-9700,
which already offers panadapter functionality? For one
thing, you can use it to monitor two frequencies and/or
modes on the same band at the same time. For
another, you can monitor and/or control the IC-9700
from your preferred SDR software and hardware of
your choosing. Or you can use an external SDR to
independently drive a larger display, which allows you
to monitor a large segment of a band. And you can use
it to do things the IC-9700 can’t do natively.
For example, an EME operator may use the PTRX-
9700, feeding another SDR along with HDSDR soft-
ware and MAP65 software (provided with WSJT-X) to
decode 90 kHz — the entire EME band segment — at
once, something the IC-9700’s own receiver cannot
do. Another application for two receivers might be to
operate two instances of WSJT-X on one band at the
same time, with one running MSK144 and the other on
Q65. Or you might run CW or SSB on the IC-9700 and
decode meteor scatter signals using MSK144 on the
SDR. Or perhaps monitor the beacon subband while
making contacts in the weak-signal portion of the
band, or during an FM contact.
Architecture
The PTRX-9700 is a small module that mounts to
existing screw locations on the IC-9700 main board. It
sits inline with the three receive signal paths, one per
band, providing buffering, ltering, and multiplexing.

www.arrl.org QST August 2022 45
QS2208-ProdRev02
IC-9700
PTRX-9700
Amplifier
Blocks
RADIOANALOG
Power
Regulation
Combining
Filtering
Multiplexing
VHF
UHF
23 cm
IF/RF out
REF In
REF out
13.8 Vdc
Figure 3 —FunctionalblockdiagramofthePTRX-9700.
Figure 4 —PTRX-9700installedintheIC-9700.RFconnections
onthenearsideoftheboardarecompleted.TheIC-9700’s
internalcablesnowroutetothePTRX-9700,andthePTRXboard
routesconnectionsbacktotheradio’smainRFboardafterltering
andbu󰀨ering.
Functionally, it breaks out each band’s receive RF
signal and feeds the signals from the IC-9700’s cur-
rently selected band to the internal receiver and to an
external SDR that you provide, with no loss in signal
such as you’d have with a receive splitter. The board’s
architecture is shown in Figure 3.
One important caveat: The PTRX-9700 can operate
only on the currently selected band of the IC-9700.
If you’re operating, say, 144 MHz, it feeds only the
144 MHz signal out to the external SDR. It doesn’t offer
the ability to use the external SDR to watch a second
band while using the IC-9700’s built-in waterfall display
on the currently selected band.
Installation
Installing the PTRX-9700 took me about 20 minutes.
The biggest part of the job is removing and then rein-
stalling all of the bottom cover screws on the radio — it
has a dozen of them. Once you have the bottom cover
off the radio, there’s plenty of room to work, and
installing the board is straightforward. The key steps are:
1) Disconnect power from the radio, and remove the
bottom cover.
2) Remove two of the screws that hold the main board
to the radio, and replace them with standoffs and
longer screws, mounting the PTRX-9700 to the
standoffs.
3) Disconnect the three receive signal cables (one per
band), and connect the PTRX-9700 board in series
with them using the provided cables.
4) Insert the PTRX-9700 into the external reference
signal path with the provided cable.
5) Insert the PTRX-9700 into the power path to the
main board by moving a power connector and
inserting the provided wiring harness.
The most intrusive part of the installation is cutting a
few plastic wire ties to facilitate moving the last section
of the radio’s power wiring harness to the PTRX-9700.
Figure 4 shows the PTRX-9700 installed in the
IC-9700. At this stage, the RF connections on the
PTRX-9700 input are completed, and the cables sup-
plied with the PTRX-9700 route RF back to the radio’s
main RF board. Figure 5 shows the board after the
installation is completed.
Radio Analog makes installation easy by providing an
l-shaped tool with properly placed tabs for removing
and installing the tiny U.FL RF connectors that Icom
uses to attach cables to the board. These are difficult
to manipulate and securely attach without this tool —
props to Radio Analog for including it.
Once I had installed the board, buttoning up the radio
and testing it were all that remained. For level of dif-
culty, I’d give this a 1 out of 5.Very straightforward.
Options
If you are using the IC-9700 without an external refer-
ence, then all you need to do after the installation is
connect your external SDR with the provided SMA
male-to-male cable. If you plan to use an external ref-
erence with the radio, you have a couple of options:
Use the provided splitter board to inject the reference
signal, or upgrade the radio’s external reference func-
tionality using a Leo Bodnar Reference Injection Board
(see the next review in this issue of QST) and accom-
panying 49.152 MHz reference oscillator.
The Reference Injection Board ts inside the radio side
by side with the PTRX-9700 and uses the provided
cable and splitter. Radio Analog provides a connection
diagram for this option on their website. Both options t
into the radio easily, and the interconnections are no
more challenging than either one by itself.

46 August 2022 QST www.arrl.org
Operation
Once you’ve installed the PTRX-9700 and, if appro-
priate, connected the external reference to the pro-
vided splitter board, connect your SDR and select
appropriate SDR software for your computer. With my
setup, I use HDSDR. I did initial testing with a HackRF
One and then moved to an Airspy HF+. Since the
Airspy HF+ also works well with MAP65 for 144 MHz
EME, that’s the SDR on which I settled. I’ve also tested
with a FUNcube Dongle Pro+, which is another good
choice.
To use the PTRX-9700, you’ll need an SDR that
covers your bands of interest, such as 144 – 148 and
430 – 450 MHz. For 1240 – 1300 MHz operation, the
IC-9700 uses 311 – 371 MHz as its IF range, so
1296 MHz is equivalent to 367 MHz at the rear-panel
SMA connector, where the SDR connects. Based on
that, to cover the entire 144 – 1300 MHz range of the
IC-9700, you’d need an SDR that covers 144 – 148,
311 – 371, and 430 – 450 MHz. Even a simple SDR
like an RTL-SDR dongle can do the job, but you’ll be
rewarded with better performance if you choose a
higher-performance SDR.
For EME operators, MAP65 (which is part of the
WSJT-X installation) is a great way to go with the
PTRX-9700. MAP65 supports multiple SDR options,
including the FUNcube Dongle, SDR-IQ, Perseus,
IQ+, WSE, SoftRock, and others. The key to covering
the full EME band is being able to sample at 96000
or 95238 Hz.
Manufacturer: Radio Analog, www.radioanalog.com.
Price: $329.
For digital mode operation on 1296 MHz, especially for
EME, I like option 2.You can add the PTRX-9700
before or after you install the Leo Bodnar kit, if you go
that route. It doesn’t add any time to the installation
process, so I recommend doing both at the same time.
Figure 5 shows the two options installed inside the
IC-9700.
Figure 5 —AddingtheLeoBodnarexternalreferenceboardtothe
IC-9700alongsidethePTRX-9700.Thetwooptionsseemalmost
madetogotogether.TheBodnarboardisvisiblejusttotheright
ofthecentersupportpostandconnectstothePTRX-9700usinga
cableprovidedwiththePTRX-9700.
Reviewed by Rus Healy, K2UA
[e-mail]
When it was released, the Icom IC-9700 received criti-
cism, especially in the digital communications commu-
nity, for its frequency accuracy and stability. Icom
released a rmware update (version 1.10) that made it
easier to set the radio’s internal oscillator to match an
external 10 MHz reference. Both topics were discussed
in the Product Review of the IC-9700 in the January
2020 issue of QST. That adjustment is a manually
Leo Bodnar IC-9700 Reference Injection Board
and Mini Precision GPS Reference Clock
applied setting, not a dynamic tracking feature that
those familiar with the use of GPS-disciplined oscilla-
tors (GPSDOs) might expect.
Some good news for enthusiasts of optimal frequency
accuracy and stability comes from UK-based Leo
Bodnar Electronics, who introduced a nonintrusive,
fully reversible, and affordable method of adding an
external reference with tracking to the IC-9700. The
Reference Injection Board is a small PC board that
installs easily inside the IC-9700 and connects to an

www.arrl.org QST August 2022 47
nect the 49.152 MHz reference that you’ll see a differ-
ence in operation.
The board is held in place with two screws and two
spacers. The screws are longer than the factory ones
to accommodate positioning the board above a per-
forated shield, where the injection board couples
49.152 MHz energy into the radio.
Leo Bodnar’s attention to detail is evident in the
board’s design. The factory screws thread into two
holes in the board for permanent storage. Should you
ever decide to remove the Reference Injection Board,
you can remove those screws from it, remove the
board, and place the screws back into the main board
— a nice touch.
Setup and Operation
You don’t need any test equipment to align and use the
Reference Injection Board with the miniGPS receiver.
You’ll need to congure the miniGPS to supply the cor-
rect reference frequency, using the conguration soft-
ware available from the Leo Bodnar product page. It’s
available for Windows or Mac OS X (see Table 2).
Connect the miniGPS to a USB port using the sup-
plied mini USB cable, and the supplied GPS antenna
to the SMA GPS port. Then open the software and
you should see a display similar to the one shown in
Figure 6. If you’re using the Mac application, the view
is different but includes the same information, plus
additional graphical elements, including a satellite
map of the current GPS position.
Set the frequency to 49152000, and then click the
update button in the right-hand pane. This saves the
Bottom Line
The Leo Bodnar miniGPS and Reference Injec-
tion Board provide a simple, aordable method
of locking your IC-9700 to a GPS referenced
clock for improved frequency stability and
accuracy. High stability really matters, espe-
cially for digital mode operating, and this setup
provides it in a small, well-designed package.
Figure 6 —The32mAoutputsettingisrecommendedbyLeo
BodnarfordrivingtheIC-9700ReferenceInjectionBoard.The
utility(availablefromtheminiGPSproductpageforMacand
Windows) requires only setting the output frequency, as shown.
external reference oscillator running at 49.152 MHz.
See the gures in the PTRX-9700 review in this
issue for more details on the board’s location and
connections.
49.152 MHz is not exactly a common reference fre-
quency. That said, TCXO and OCXO modules are
available that can provide this frequency, but GPS-
disciplined options are also readily available. Leo
Bodnar offers GPSDOs that are programmable to
work at nearly any frequency between 400 Hz and
810 MHz, including the Mini Precision GPS Reference
Clock (miniGPS, as labeled), reviewed here. Paired
with the Reference Injection Board, the miniGPS pro-
vides a great solution for GPS-locking the IC-9700,
and one that works seamlessly with the Radio Analog
PTRX-9700 that’s also reviewed in this issue of QST.
Installation
The Reference Injection Board installs easily inside the
radio. The process is simple; the most time-consuming
part is taking the bottom cover off the radio. Follow
these installation steps:
1) Remove all connections from the radio. Remove the
bottom cover.
2) Peel off the black spongy cover on the reference
input shield. Leo Bodnar recommends affixing it
elsewhere inside the radio, but I removed it from my
radio.
3) Remove the screws on the main board that are
marked 10 and 11. Install them in the two blank
holes on the Reference Injection Board.
4) Install the Reference Injection Board using the sup-
plied hardware.
5) Install the supplied SMA extension cable between
the injection board and the rear panel 10 MHz refer-
ence input. Alternatively, connect it using a supplied
cable with the PTRX-9700 board.
6) Reinstall the bottom cover.
Reconnect and test the radio. Its operation should be
unaffected by installing the board. It’s not until you con-