BUGLE3
MM / MC Phonostage
Made in USA
BUGLE3 Phonostage
2
Copyrights & Trademarks
Copyright Hagerman Audio Labs 2017. 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. 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
BUGLE3 Phonostage
3
Description
Congratulations, you have just purchased one of the highest performance-per-dollar
audiophile products available! The Bugle3 was designed to be a simple yet flexible
phonostage capable of achieving very good sound quality comparable to far more
costly units. It is a third-generation circuit topology that uses low noise audio
opamps implementing passive split equalization filters and to provide a low output
impedance. Both Gain and Loading are adjustable using tiny switches.
Specifications
Item Specification
Gain 40, 50, 60, 64dB
Input Impedance 47k, 553, 100, 85
Output Impedance 330 ohm
Bandwidth 10Hz to 1000kHz
Distortion <0.01% @1kHz
Noise 64dB ref 0.5mV A-weighted (MC)
Size 3” x 5” x 1”
Power 120/240VAC 1W
Settings
Use the small internal switches for setting both gain and loading according to this
table. The arrow on switch indicates engaged. Beware as left and right channel
switches face opposite directions.
Switch Loading (Ohms) Gain (dB)
0 47k 40
1 553 50
2 100 60
1 + 2 85 64
Operation
Connect a cable between output jacks and your audio system. Attach the turntable
ground wire to the grounding post and connect the turntable RCA output plugs into
the Bugle3 input jacks. Plug in the power supply. Enjoy!
The Bugle3 must get an Earth ground from the linestage or receiver via the
connecting cables; otherwise there will be hum. If the inputs to the linestage are
floating, then add an extra ground wire to the Bugle3.
VCC
VEE
J1
U1
TLE 24 26
L1
1mH
L2
1mH
C2
220 uF
C3
220 uF
C1
100 nF
D2
LED
R24
4k7 5
R25
4k7 5
R35
470
R36
470
Hagerman Audio Labs
PO B ox 6 191 1
Hono lulu , H I 96 839
1
2
3
U2*
LM4 56 2R1*
100
C9
220 uF
C7
100 nF
J2*
R3*
1.3 0k
R4*
13. 0k
R5*
13. 0k
R6*
1.4 3k
C4*
220 nF
U3*
LM4 56 2
R8*
1.3 0k
R9*
13. 0k
R10 *
8.4 5k
R11 *
332
C5*
10n F
U4*
LM4 56 2
R13 *
47. 5k
R14 *
1.4 3k
R15 *
13. 0k
R16 *
332
J3*
C13
220 uF
C11
100 nF
C17
220 uF
C15
100 nF
R17
100
R19
47
R21
47
R22
47
R20
47
R18
100
C10
220 uF
C14
220 uF
C18
220 uF
C8
100 nF
C12
100 nF
C16
100 nF
VCC
VEE
C6*
220 nF
R23 *
47k
Hagerman Audio Labs
PO B ox 6 191 1
Hono lulu , H I 96 839
1
2
3
1
2
3
1
2
3
562
1.4 3k
562
100
1.4 3k
562
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