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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.
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