Hagerman Audio TRUMPET User manual

TRUMPET
Vacuum Tube MM Phonostage
Made in USA

TRUMPET Vacuum Tube MM Phonostage
2
Copyrights & Trademarks
©Copyright Hagerman Audio Labs 2012. All rights reserved. No part of this
document may be photocopied, reproduced, or translated to another language
without the prior written consent.
Disclaimer
The information contained in this document is subject to change without notice.
Hagerman Audio Labs shall not be liable for errors contained herein or for
consequential damages in connection with the furnishing, performance, or use of this
material.
Warranty
Hagerman Audio Labs warrants this product free of defects in materials and
workmanship for a period of 10 years (90 days on tubes). If you discover a defect,
Hagerman Audio Labs will, at its option, repair or replace 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 apply if the product has
been damaged by negligence, accident, abuse or misuse or misapplication, has been
damaged because it has been improperly connected to other equipment or has been
modified without the express written permission of Hagerman Audio Labs. This
warranty is limited to the replacement or repair of this product and not to damage to
equipment of other manufacturers. Any applicable implied warranties, including
warranty of merchantability, are limited in duration to a period of the express
warranty as provided herein beginning with the original date of purchase and no
warranties, whether express or implied shall apply to the product thereafter. Under
no circumstances shall Hagerman Audio Labs be liable for any loss, direct, indirect,
incidental, special, or consequential damage arising out of or in connection with the
use of this product.
Hagerman Audio Labs
PO Box 61911
Honolulu, HI 96839
808-383-2704 (voice)
www.haglabs.com

TRUMPET Vacuum Tube MM Phonostage
3
Description
The Trumpet is a state-of-the-art MM phonostage that uses balanced feedback-free
differential triode gain stages and passive equalization. This topology offers
incredible linearity and low distortion combined with unrestricted dynamics and
clarity, delivering a hugely open and clear sound. The massive power supply is fully
choke regulated for clean, impulse-free current draw from the ac line. The Trumpet
has earned Stereophile class “A” recommendation and industry acclaim.
Specifications
Item Specification
Gain 44dB
Input Impedance 47k ohm
Output Impedance 750 ohm
RIAA Response +/-0.5dB from 20Hz to 20kHz
Bandwidth 5Hz to 250kHz
Distortion 0.03% @1kHz
Noise 80dB ref 5mV A-weighted
Overload 250mV @1kHz
Size 7” x 12” x 10”
Power 120Vac, 70W
Tube Compliment 12AX7 x 4, 12AU7 x 4

TRUMPET Vacuum Tube MM Phonostage
4
Operation
The Trumpet installs between your turntable and linestage. Be sure to connect the
ground lead to the grounding lug near the inputs.
Do NOT operate unit without tubes installed. Connect the power cord to a 120Vac
source. Turn on the Heater switch and wait for 30 to 60 seconds. Then turn on the
high voltage. The indicator lamp will turn green. The Trumpet requires about 30
minutes to warm up and sound its best, which is typical of high quality tube
equipment. Set both Mute/Polarity switches to the right (or left for inverted signal).
Center position is mute.
Tube Rolling
The Trumpet responds admirably to tube rolling. New old stock (NOS) tubes are
generally the best, offering various sonic improvements. Different tubes sound
differently, and the final result becomes a matter of personal taste.
Always replace tubes with their equivalents! Do not use, for example, a 12AT7 in one
of the 12AX7 locations. Starting from the rear of the unit (near RCA jacks), the tubes
are in order: 12AX7, 12AX7, 12AU7, and 12AU7. It is best to use matched tubes in
matched left-right pairs.

TRUMPET Vacuum Tube MM Phonostage
5

A A
B B
C C
D D
E E
F F
G G
5 5 4 4 3 3 2 2 1 1
This document contains proprietary information and except with written permission of Hagerman Technology LLC such information shall not be published, or disclosed to others, or used for any purpose, and the document shall not be copied in whole or in part. Copyright Hagerman Technology LLC 2006. All rights reserved.
6V3ct 5V0ct
2x0R3
205 205 205 205 +300V
Heater Heater -300V Gnd Gnd
Windings must be in phase!
6V2 @ 2A4 300V @ 39mA
700Vct
120Vac
Notes: All resistors are 1W unless specified.
n/a A
Gold Trumpet: Power Supply Hagerman Technology LLC P.O. Box 26437 Honolulu, HI 96825
14Tuesday, June 27, 2006
Title Size Document Number Rev Date: Sheet of
R1 10 2W C2
100uF 450V
D1 UF4007
L1 10H
D5 UF4007 D2 UF4007
F1 1A
D6 UF4007
R2 100 2W
L2 10H R4
50k 2x5W
L3 10H
L4 10H
R9 100 2W
R8 10 2W
C5 100uF 450V R7
50k 2x5W
L5 3mH
C9 40mF 4x10V
R6 680
S2 Heaters
R12 220
R11 1R1 9x2W
S1 HighVoltage
T1 273DZ
R13 220 R5 6k8 C7 10nF 1kV
D7 UF5400 D9 UF5400 D8 UF5400 D10 UF5400
C3 100uF 450V C6 100uF 450V
C4 100n 600V C1 100nF 600V
C8 100uF 25V
R3 330 2W R10 330 2W
Red D3 Green
J1
1 2 3 4 5 6
J2 AC
1 2 3
C50 0.22uF 50V
1N4148
C99 10nF 1kV

A A
B B
C C
D D
E E
F F
G G
5 5 4 4 3 3 2 2 1 1
This document contains proprietary information and except with written permission of Hagerman Technology LLC such information shall not be published, or disclosed to others, or used for any purpose, and the document shall not be copied in whole or in part. Copyright Hagerman Technology LLC 2001. All rights reserved.
6mA
150V
8mA33mA
Notes: All resistors 1W unles specified. RIAA is 37.5k & 2nF, 29.8k & 3.3k & 94nF.
1mA
1mA
140V
140V
1
2
6
7
8
2
3
6
6 67
7 7
8
8 8
3
3 3
2
2 2
1
1
1 1
1
2
n/a A
Gold Trumpet: Amplifier Left Hagerman Technology LLC P.O. Box 26437 Honolulu, HI 96825
24Tuesday, June 27, 2006
Title Size Document Number Rev Date: Sheet of
+280V +280V
+280V +280V
+280V
+300V
-280V
+300V
-300V
-280V
-280V
-300V +300V
+6V3
V1A ECC83 V1B ECC83
R24 75k 2x1W
C12 47nF 630V
R17 150k R44 150k
R41 220 R19 220
V2A ECC83 V2B ECC83
C13 1nF 630V
R42 220 R20 220
R14 150k R47 150k
R35 3k3
R45 220 R15 220
C16 220nF 400V C11 220nF 400V
R25 150k R34 150k
R30 75k 2x1W
C14 10uF 250V
R26 75k 2x1W
R31 75k 2x1W
C15 10uF 250V
R51 2k2
R49 300k R50 300k
R33 6k8
V3B ECC82
R46 220
R28 1M
C10 1uF 400V
R27 50k 2x5W
V3A ECC82
R36 50k 2x5W
J3 Output
S4 Polarity/Mute
C19 1uF 400V C24 1uF 400V
C22 20mF 2x10V
R48 2k2
C23 100uF 450V C18 100uF 450V
D12 1N4148
D13 1N4148
C17 1uF 400V
R37 1M
R39 220 R22 220
J4 Input
R23 47k
C20 100uF 450V C25 100uF 450V
C21 1uF 400V C26 1uF 400V
R16 220
R18 220 R43 220
R38 1M R29 1M
J7
1 2 3 4 5 6
R21 220 R40 220
V4B ECC82 V4A ECC82
D11 1N4148 D14 1N4148
R98 1M
F2

A A
B B
C C
D D
E E
F F
G G
5 5 4 4 3 3 2 2 1 1
6mA
1mA
1mA
150V
150V
1
1
1
1 1
1
2
2
2
2 2
2
3
3
3 3
8
8
8 8
7
7
7 76
6
6 6
This document contains proprietary information and except with written permission of Hagerman Technology LLC such information shall not be published, or disclosed to others, or used for any purpose, and the document shall not be copied in whole or in part. Copyright Hagerman Technology LLC 2001. All rights reserved.
n/a A
Gold Trumpet: Amplifier Right Hagerman Technology LLC P.O. Box 26437 Honolulu, HI 96825
34Tuesday, June 27, 2006
Title Size Document Number Rev Date: Sheet of
+280V +280V
+280V +280V
+300V
-280V
+300V
-300V-280V
V5A ECC83 V5B ECC83
R62 75k 2x1W C29
47nF 630V
R55 150k R82 150k
R79 220 R57 220
V6A ECC83 V6B ECC83
C30 1nF 630V
R80 220 R58 220
R52 150k R85 150k
R73 3k3
R83 220 R53 220
C33 220nF 400V C28 220nF 400V
R63 150k R72 150k
R68 75k 2x1W
C31 10uF 250V
R64 75k 2x1W
R69 75k 2x1W
C32 10uF 250V
R71 6k8
V7B ECC82
R84 220
R66 1M
C27 1uF 400V
R65 50k 2x5W
V7A ECC82
R74 50k 2x5W
J8 Output
S6 Polarity/Mute
D16 1N4148
D17 1N4148
C34 1uF 400V
R75 1M
R77 220 R60 220
J9 Input
R61 47k
R54 220
R56 220 R81 220
R76 1M R67 1M
R59 220 R78 220
V8B ECC82 V8A ECC82
D15 1N4148 D18 1N4148
R99 1M
F3