Hagerman Audio BUGLE2 User manual

BUGLE2
MM / MC Phonostage PCB
Made in USA

BUGLE2 Phonostage Kit PCB 2
Copyrights & Trademarks
 Copyright Hagerman Audio Labs 2013 - 2017. A rights reserved. No part of this
document may be photocopied, reproduced, or trans ated to another anguage
without the prior written consent.
Disclaimer
The information contained in this document is subject to change without notice.
Hagerman Audio Labs sha not be iab e for errors contained herein or for
consequentia damages in connection with the furnishing, performance, or use of this
materia .
Warranty
Hagerman Audio Labs warrants this product free of defects in materia s and
workmanship for a period of 10 years. If you discover a defect, Hagerman Audio
Labs wi , at its option, repair or rep ace the product at no charge to you provided
you return it during the warranty period, transportation charges prepaid to
Hagerman Audio Labs. This warranty does not app y if the product has been
damaged by neg igence, accident, abuse or misuse or misapp ication, has been
damaged because it has been improper y connected to other equipment or has been
modified without the express written permission of Hagerman Audio Labs. This
warranty is imited to the rep acement or repair of this product and not to damage to
equipment of other manufacturers. Any app icab e imp ied warranties, inc uding
warranty of merchantabi ity, are imited in duration to a period of the express
warranty as provided herein beginning with the origina date of purchase and no
warranties, whether express or imp ied sha app y to the product thereafter. Under
no circumstances sha Hagerman Audio Labs be iab e for any oss, direct, indirect,
incidenta , specia , or consequentia damage arising out of or in connection with the
use of this product.
Hagerman Audio Labs
PO Box 61911
Hono u u, HI 96839
808-383-2704 (voice)
www.hag abs.com

BUGLE2 Phonostage Kit PCB 3
Description
Congratu ations, you have just purchased one of the highest performance-per-do ar
audiophi e products avai ab e! The Bug e2 was designed to be a simp e yet f exib e
phonostage capab e of achieving very good sound qua ity comparab e to far more
cost y units. It is a second-generation circuit topo ogy that uses ow noise audio
opamps imp ementing passive sp it equa ization fi ters and to provide a ow output
impedance. Gain can be set for either 40dB or 60dB (suitab e for MC cartridges).
Avai ab e as a PCB-on y kit, you wi have to purchase a of the components to
comp ete assemb y.
Specifications
Item pecification
Gain 40dB (MM) or 60dB (MC)
Input Impedance 47k (MM) or 100 ohm (MC)
Output Impedance 300 ohm
Bandwidth 10Hz to 1000kHz
Distortion <0.01% @1kHz
Noise 64dB ref 0.5mV A-weighted (MC)
Size 3” x 5” x 1”
Power 120Vac / 240Vac 1W

BUGLE2 Phonostage Kit PCB 4
Parts
The fo owing parts need to be purchased to comp ete your kit. If you want to make
substitutions, it is recommended to bui d as stock first to make sure it works
proper y. Then modify to your iking. For resistor detai s, see chart in back of this
manua . For EU version of power supp y, use the 709-GS06E-6P1J.
Item Mouser Qty Reference
Box 635-A-27-B 1
RCA (red) 490-RCJ-042 2 J2,J3
RCA (white) 490-RCJ-043 2 J2,J3
Opamp 926-LM4562NA/NOPB 3 U2,U3,U4
Sp itter 595-TLE2426ILP 1 U1
Diode 511-1N5819 1 D1
LED 696-SSL-LX3044LYD 1 D2
1mH RL622-102K-RC 2 L1,L2
100nF 80-MMK7.104K100K00L4 7 C1
10nF 80-PHE426MK5100JR05 2 C5
220nF 80-PHE426HB6220JR06 4 C4,C6
220uF 647-UVZ1C221MED 8 C2,C3
Bracket 534-4332 1
DC Jack 163-179PH-EX 1 J1
Socket 535-08-3518-10 3
47R5 271-47.5-RC 10 R17,R18,R19,R20,R21,R22
332 271-332-RC 10 R1,R7,R11,R12,R16
1.30k 271-1.3K-RC 10 R3,R8
1.43k 271-1.43K-RC 10 R6,R14
4.75k 271-4.75K-RC 10 R24,R25
8.45k 271-8.45K-RC 10 R10
13.0k 271-13K-RC 10 R4,R5,R9,R15
47.5k 271-47.5K-RC 10 R2,R13
Feet 517-SJ-5003BK 4
Power Supp y 709-GS06U-6P1J 1
Item McMaster Carr Qty Reference
#4 x 3/16 91772A105 4
#6 x ¼ 91772A144 1
#6 x 5/8 91772A150 1
#6 nut 96278A007 1
#6 knur 92741A110 1

BUGLE2 Phonostage Kit PCB 5
Assembly
Using the stuffing guide, insta a of the resistors. So der in p ace and cut eads. The
guide shows va ues for 40dB. Gain and oading options are isted in the fo owing
chart.
Resistor 40dB 50dB 60dB
R23 681 100
R1 316 316 100
R3, R8 1k30 681 392
 Insta resistors
Add diode. So der, and cut.
 Insta diode
Insert sockets for the operation amp ifiers. Make sure of orientation! So der in p ace.
 Insta sockets
Add 100nF decoup ing capacitors. So der and cut.
 Insta 100nF caps
Add DC jack, TLE2426 rai -sp itter (TO-92 package), and LED. The ong ead of LED
goes into square ho e. So der in p ace and cut eads.
 Insta DC jack, rai -sp itter, LED
Insta fi m capacitors, 220nF first, then 10nF. So der in p ace and cut eads.
 Insta fi m caps
Add inductors. So der in p ace and cut.
 Insta inductors
Insert RCA jacks. Use red for right channe , white for eft. Make sure they are
pressed a the way down to circuit board. So der.
 Insta RCA jacks
Insta 220uF e ectro ytic capacitors. Long ead goes into square ho e.
 Insta e ectro ytic capacitors

BUGLE2 Phonostage Kit PCB 6
Insta opamps into sockets. The dot in the p astic indicates pin1, which is the ho e
with the square pad.
 Insta opamps
The assemb y is now ready for initia testing. Connect the power supp y to the DC
jack. P ug the supp y into the wa , and the LED shou d turn on. Some of the power
supp ies have a few seconds of de ay so don’t panic. Disconnect.
 E ectrica test
Add the grounding bracket using the #6 x 1/4” screw. Make sure the f at surface
faces rearward and is a igned with the edge of circuit board.
 Insta ground bracket
Modify end pane s by dri ing 3 ho es in each (for RCA jacks, ground, and power).
 Modify end pane s
Insert circuit board assemb y into the bottom section of the p astic enc osure. Do this
by p acing end pane s (textured surface outwards) onto the RCA jacks and then
dropping into position. Secure in p ace using the #4 x 3/8” screws.
 Insert board into enc osure
Add the #6 x 1/2” ground screw through the bracket and secure using #6 nut. Add
#6 thumbscrew (not too tight).
 Insta ground post
Turn unit over and add rubber feet. And fina y, app y top cover and secure in p ace
using the four remaining screws.
 Add feet and top cover

BUGLE2 Phonostage Kit PCB 7
Installation
Congratu ations! Your Bug e2 is now comp ete and ready for insta ation.
Testing
If you have a DVM you can perform additiona e ectrica testing prior to insta ation.
With power app ied, the DC vo tage on the outputs shou d read 0V (or ess than
20mV). The vo tages (re ative to the grounding post) on pin 8 of the opamps shou d
be a positive vo tage of rough y +10V. Each opamp wi have a different reading, as
the extensive fi tering is ossy, so the input opamps have the owest vo tage. The
vo tages on pin 4 of the opamps wi be negative, rough y –10V.
If you want to measure bandwidth or frequency response, you wi need an iRIAA
fi ter, a sinewave osci ator, and either an osci oscope or AC vo tmeter. A quick check
for equa ization accuracy is to app y a 500Hz square wave. The output waveform
shou d be identica in shape. If there are droops, sags, overshoots, or spikes, the EQ
is in error. If you have bui t the unit per these instructions such testing is not
necessary.
Operation
Connect a cab e between output jacks and your audio system. Attach the turntab e
ground wire to the grounding post and connect the turntab e RCA output p ugs into
the Bug e2 input jacks. P ug in the power supp y. Enjoy!
The Bug e2 must get an Earth ground from the inestage or receiver via the
connecting cab es; otherwise there wi be hum. If the inputs to the inestage are
f oating, then add an extra ground wire to the Bug e2.
Trou leshooting
If the sound is not good, doub e-check a resistor va ues to make sure they were
insta ed into their correct ocations.
If a channe has a scratchy sound to it (not a nice c ean, quiet hiss) then it is ike y
the input opamp has been damaged and shou d be rep aced. These devices are very
sensitive to ESD and precautions must be taken. Hum, buzz, and other noise sources
(WiFi) can be induced into the Bug e2 and/or input cab es via c ose proximity. P ace
as far from other equipment as possib e.

Ø0.36in
(4places)
0.85in0.85in
0.135in
0.19in
0.19in
0.85in0.85in
Ø0.14in
Ø0.36in
0.19in