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There are currently no product reviews.
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I received a good service manual, with good resolution. Improve the instructions for the purchase because they are not well understood.
For the rest, so good.
Thanks Angel.
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Very good documentation for the Grundig 2077 model (as well as similar 800/900/1000 series radios). The first two pages are a summary of reception specifications and output capability. The third page is the tuner dial indicator and dial cord routing diagram. the final ~5 pages are the schematics for the various models (including 2077). The scan quality of the schematics are good, adn can be easily read if zoomed in. The documents are in German, not English as stated. It would have been nice to have the tuning sequence and settings, and some trouble shooting materials... or component and wiring map.
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Perfect like it was descriped, Perfect like it was descriped
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Very good detail, all pages clear, exactly what I needed
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Excellent service, and just what I needed to service my TU-7700. All pages of the manual are clear and easily readable.
KMC-35/36
CIRCUIT DESCRIPTION
Hot Microphone Function
In the Hot microphone state, only microphones whose PTT switch is pressed can send modulation signals in the environment in which several microphones are connected to the transceiver in parallel. In the Normal microphone state, if the PTT switch on one of the microphones is pressed, modulation signals are sent from all microphones.
â� Circuit description
Hot microphone operation can be performed by cutting the jumper (JP1). If the jumper is not cut (Normal microphone state), bias voltage is always applied to the microphone element (Q3 is always ON) and if the microphone mute of the transceiver to which the KMC-35/36 is connected is released, modulation signals can be sent even when the microphone PTT switch is not pressed. If the jumper is cut (Hot microphone state), bias voltage is applied to the microphone element only when the PTT switch is pressed (Q3 turns ON only when the PTT SW is pressed), and modulation signals cannot be sent when the microphone PTT switch is not pressed.
5V
C17 100p
Q1 DTC114EUA
C14 1000p
R1 10k Q3 DTA144EUA
J1 1 BLC 2 SB 3 GND 4 PTT 5 ME(MIC GND) 6 MIC 7 HK(HOOK) 8 DM *L1 L2
PTT SW R9 1.5k C6 1000p
L3 L4 L5 L6 L7 *L8
R6 0
C20 1000p
Q2 DTC144EUA
R10 0
C7
S70-0499-08
1u 16
R2 10k
R8 1k
C9 10u 16 MIC
470p R7 3.9k R5 10k C11 R4 3.9k R3 10k JP1
E58-0475-05
C10 S1 0.068u
T91-0538-05
*C15
*C5
*C16 C12 1000p
*C19
C13 1000p C18 1000p
3
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