TRUMPET REFERENCE

Vacuum Tube Phonostage

Made in USA.

TRUMPET REFERENCE Vacuum Tube Phonostage

2

Copyrights & Trademarks © Copyright Hagerman Audio Labs 2013. 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 www.haglabs.com

TRUMPET REFERENCE Vacuum Tube Phonostage

3

Description The Trumpet Reference is a true reference-class phonostage for the most demanding of audiophiles. Based on the original Trumpet (Stereophile class-A recommended component), it adds pushbutton control of all functions, a second input, and upgrades for many of the components. The chassis has also been changed to reflect the reality of equipment racks by putting the power supply and amplifier boards in a side-by-side configuration. Status LEDs on the front panel indicate operational settings of the various functions. In addition to standard RIAA equalization, three other curves used in the LP "microgroove" era have been included. This combination of features, convenience, and sonic performance are unmatched at this price.

Specifications Item Specification Gain 44dB (MM) / 64dB, 70dB (MC) Input Impedance 47k (MM) / 1k, 322, 181, 131, 91, 76, 64, 57 (MC) Output Impedance 800 ohm RIAA Response +/-0.5dB from 20Hz to 20kHz Bandwidth 8Hz to 500kHz Distortion <0.05% @1kHz Noise 70dBA (MC) Size 17” x 12” x 5” Weight 19 lbs. Power 120Vac / 240Vac, 70W Tube Compliment 12AX7 x 4, 12AU7 x 4

TRUMPET REFERENCE Vacuum Tube Phonostage

4

Operation The Trumpet Reference installs between your turntable and linestage. Be sure to connect the ground lead to the grounding lug near the inputs. Connect the power cord to an AC source. Turn on using the power switch on the back panel. Press the POWER button on the front. Immediately the heaters will turn on and after a 32 second delay the high voltage supplies will activate.

Controls Control Description POWER This button toggles power on and off. The left LED indicates

heater voltage for the tubes; the right LED indicates high voltage.

EQ There are four settings defined by turnover and cut, arranged left to right: 400Hz / 11dB (AES, early ffrr) 500Hz / 11dB (Decca, EMI, late ffrr) 500Hz / 13.7dB (RIAA) 500Hz / 16dB (Columbia, NAB)

STEREO Left LED is mono.

INPUT Left LED is MM.

POLARITY Left LED is inverted (MC).

GAIN There are two gain settings (MC): 64dB (>0.25mV cart) 70dB (<0.25mV cart)

LOADING There are eight loading settings (MC), arranged left to right: 1k 322 181 131 91 76 64 57

TRUMPET REFERENCE Vacuum Tube Phonostage

5

Commentary The Trumpet Reference responds admirably to tube rolling. New old stock (NOS) tubes are generally the best, offering various sonic improvements, with the final result becoming a matter of personal taste. Try to match in left/right pairs, to maintain equalization frequency balance. 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, the tubes are in order: 12AX7, 12AX7, 12AU7, 12AU7. Cartridge loading depends on the length and type of interconnects used and it is always good to start with a value close to the manufacturer’s recommendation. Generally, loading provided by the Trumpet Reference is effectively lower than the equivalent from a transformer. That is, if you like the sound from 100 ohm transformer loading (into the MM input), then try the 131 ohm setting on the MC input. In the end, do not worry about numbers. Adjust to what your ears prefer. As far as gain selection, it is better to go with lower gain if possible. This optimizes overall headroom and distortion of the audio system. The EQ settings provide various curves for achieving better sound from your vinyl playback. The 3rd LED from the left is RIAA (modern) as will be used most often. The Decca and Columbia curves help with some older microgroove LPs. Again, this is adjusted for personal preference, and was never an exact science. Nevertheless, this can make a significant improvement for certain instruments such as violin and on vocals.

J4

J2

J3

C1

100nF

VCC

RES

A0

P6

P7

18

09

16

17

06

05

P5

P4

P3

P2

P1

P0

15

14

13

12

11

10

SCL

SDA

A2

A1

04

03

02

01

INT

08

U2

MCP23008

S1

POWER

21 3 4 5 6

S2

EQ

S3

POL

S4

STEREO

S5

INPUT

S6

GAIN

S7

LOAD

VCC

B7

B6

A5

B5

B2

A3

B1

B3

A6

A7

B0

A1

A2

02

07

09

15

16

06

18

01

08

13

12

04

11

A4

U1

05

03

14PIC16F88

17

A0

B4

10

R2

10k

R3

10k

R4

10k

CLR

SDA

SCL

R5

1k

R6

1k

D1

YEL

D2

YEL

C2

100nF

21 3 4 5 6

R1

10k

21 3 4 5 6 7 8 9 10

11

12

LOAD0

HEATER

POWER

LOAD1

LOAD2

MONO

GAIN

INPUT

BASS

CUT0

CUT1

POLAR

MUTE

21 3 4

R8

100

R7

1k

VCC

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

J1

MCLR

VCC

GND

PCLK

PDAT

SCL

SDA

INT

TX

RX

ENA

VBB

VCC

B+

H+

0x07

J2

+5V

+5V

GND

POW

GND

HEAT

J3

LOAD0

LOAD1

LOAD2

GAIN

MONO

INPUT

BASS

CUT0

CUT1

POLAR

MUTE

J4

+5V

GND

RX

TX

DIODES NOT SHOWN

R13

1k

CLR

D7

YEL

RES

A0

P6

P7

18

09

16

17

06

U4

MCP23008

05

P5

P4

P3

P2

P1

P0

15

14

13

12

11

10

SCL

SDA

A2

A1

04

03

02

01

INT

08

VCC

R14

1k

D8

YEL

R15

1k

D9

YEL

R16

1k

D10

YEL

R17

1k

D11

YEL

R18

1k

D12

YEL

R19

1k

D13

YEL

R20

1k

D14

YEL

SCL

SDA

R9

1k

CLR

D3

YEL

RES

A0

P6

P7

18

09

16

17

06

U3

MCP23008

05

P5

P4

P3

P2

P1

P0

15

14

13

12

11

10

SCL

SDA

A2

A1

04

03

02

01

INT

08

VCC

R10

1k

D4

YEL

R11

1k

D5

YEL

R12

1k

D6

YEL

SCL

SDA

C3

100nF

VCC

C4

100nF

VCC

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

0x00

0x01

D00

D01

D02

D03

D15

D14

D13

D12

D11

D10

D09

D08

R21

1k

CLR

D15

YEL

RES

A0

P6

P7

18

09

16

17

06

U5

MCP23008

05

P5

P4

P3

P2

P1

P0

15

14

13

12

11

10

SCL

SDA

A2

A1

04

03

02

01

INT

08

VCC

R22

1k

D16

YEL

R23

1k

D17

YEL

R24

1k

D18

YEL

R25

1k

D19

YEL

R26

1k

D20

YEL

R27

1k

D21

YEL

R28

1k

D22

YEL

SCL

SDA

C5

100nF

VCC

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

0x02

D16

D17

D18

D19

D20

D21

D22

D23

LOAD0

ENABLE

C6

100nF

RES

A0

P6

P7

18

09

16

17

06

U6

MCP23008

05

P5

P4

P3

P2

P1

P0

15

14

13

12

11

10

SCL

SDA

A2

A1

04

03

02

01

INT

08

VCC

SDA

SCK

R34

1k

R33

1k

R32

1k

R31

1k

R30

1k

R29

1k

Q6

ZTX549

Q5

ZTX549

Q4

ZTX549

Q3

ZTX549

Q2

ZTX549

Q1

ZTX549

LOAD1

LOAD2

MONO

GAIN

INPUT

VCC

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

0x03

BASS

ENABLE

C7

100nF

RES

A0

P6

P7

18

09

16

17

06

U7

MCP23008

05

P5

P4

P3

P2

P1

P0

15

14

13

12

11

10

SCL

SDA

A2

A1

04

03

02

01

INT

08

VCC

SDA

SCK

R40

1k

R39

1k

R38

1k

R37

1k

R36

1k

R35

1k

Q12

ZTX549

Q11

ZTX549

Q10

ZTX549

Q9

ZTX549

Q8

ZTX549

Q7

ZTX549

CUT0

CUT1

POLAR

MUTE

HEATER

VCC

Q13

ZTX549

R41

1k

POWER

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

0x04

L1

D2

1N5821

L2

D3

1N5821

T1

372FX

D4

1N5821

D1

1N5821

C2

10mF

ADJ

OUT

1 3

42

U1

KA278RA05

C4

1mF

C1

10nF

C3

10mF

N2

N1

6VAC

6VAC

600VAC

600VAC

21 3 4 5 6

21 3 4 5 6

+300V

+6V

-300V

+5V

POWER

HEATER

R16

1k

D15

LED

+5V

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

J1

+300V

+6V

GND

+6V

GND

-300V

J2

+5V

GND

+5V

GND

POWER

HEAT

D6

1N5821

D7

1N5821

D8

1N5821

D5

1N5821

C7

10mF

ADJ

OUT

1 3

42

U3

KA278RA05

C10

1mF

C8

10mF

6VAC

6VAC

R3

1k30

R4

0R22

C5

10mF

ADJ

OUT

1 3

42

U2

KA278RA05

R2

0R22

C9

1mF

R1

1k30

C6

10mF

+6V

8

S1

127

HEATERS

R17

1k

D16

LED

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

R9

100

R10

100

SIG-IN

SIG-IN

8

S3

127

C11

10nF

R5

4k7

C12

10nF

R6

4k7

8

S2

127

POWER

D9

1N4007

D10

1N4007

D12

1N4007

D11

1N4007

C13

10nF

C14

10nF

R7

10

R8

10

L1

157J

L2

157J

L3

157J

L4

157J

C15

100uF

C17

100uF

C16

100uF

C18

100uF

R11

330

R12

330

+250V

-250V

R14

100k

D13

LED

R15

100k

D14

LED

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

C1

100uF

-250V

+250V C2

100uF

C3

1uF

C4

1uF

R1

1k

R2

1k

C5

100uF

C6

100uF

C7

1uF

C8

1uF

+230V

-230V

21 3 4 5 6 21 3 4 5 6 87 9 10

11

12

LOAD0

LOAD1

LOAD2

MONO

GAIN

INPUT

BASS

CUT0

CUT1

POLAR

MUTE

+6V

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

J1

+300V

+6V

GND

+6V

GND

-300V

J2

LOAD0

LOAD2

LOAD1

MONO

GAIN

INPUT

BASS

CUT1

CUT0

POLAR

MUTE

R6*

470

81234

765

S4

Z2132

J3*

LOAD2

81234

765

S3

Z2132

R5*

220

81234

765

S2

Z2132

R4*

100

R3*

1k

LOAD1

LOAD0

81234

765

S1

Z2132

MONO

C19*

1mF

Q1A*

LSK389

Q1B*

LSK389

R14*

10k

R15*

10k

R12*

470

R13*

100

81234

765

S5*

Z2132

R10*

4k7

R11*

4k7

C21*

220nF

PRE+

GAIN

C20*

1mF

+270V

-270V

C17*

0pF

C22*

220nF

PRE-

R7*

22

R8

100k

R9

100k

R16

100k

R17

100k

R21*

22

D5

15V

D6

15V

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

PRE+

81234

765

S6*

Z2132

INPUT

J4*

R18*

220k

R20*

68k

81234

765

S1*

Z2132

MONO

R19*

220k

PRE-

INPUT-

INPUT+

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

V1A*

12AX7

R22*

220k

R23*

220

R26*

150k

R30*

150k

C26*

10uF

V1B*

12AX7

R27*

150k

R24*

220k

R31*

150k

R25*

220

R28*

150k

R29*

150k

D1*

1N4148

INPUT+

INPUT-

C23*

47nF

R32*

10k

81234

765

S8

Z2132

R33*

22k

BASS

C24*

220nF

C25*

220nF

BASS+

BASS-

+270V

-270V

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

V2A*

12AX7

R34*

150k

R35*

220

R38*

150k

R42*

150k

C30*

10uF

V2B*

12AX7

R39*

150k

R36*

150k

R43*

150k

R37*

220

R40*

150k

R41*

150k

D2*

1N4148

BASS-

BASS+

81234

765

S10

Z2132

CUT0

81234

765

S9

Z2132

C27*

680pF

R44*

4k7

C28*

330pF

R45*

10k

CUT1

R47*

470k

C29*

680pF

R46*

4k7

EQ-

EQ+

+270V

-270V

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839

V3A*

12AU7

R48*

220

R52*

220 V4A*

12AU7

R56*

220

R61*

100k

C31*

1uF

R58*

470k

EQ+

81234

765

S12

Z2132

J5*

R50*

220

R54*

220

V3B*

12AU7

V4B*

12AU7

R55*

220

R53*

220

R49*

220

R57*

220

EQ-

C32*

1uF

R59*

470k

R62*

100k

R51*

220

81234

765

S11*

Z2132

POLAR

MUTE

D3*

1N4148

D4*

1N4148

+300V

R60*

100k

R63*

100k

-300V

Hagerman Audio Labs

PO Box 61911

Honolulu, HI 96839