Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Howard -
The schematic diagram of the AC-4 power supply shows the connector
pin-out from the BACK of the connector, (where the wires are,) while the
transmitter schematic shows the pin numbers as seen looking from the PIN
(outside) side.
Looking at the back of the transmitter, the top, left pin is the +650 V.
So looking at the outside of the supply cable, with the vertical pins to
the RIGHT, the pins are as follows, left to right.
1 - 4 - 7 - 10 - - | |
2 - 5 - 8 - 11 - - - -
3 - 6 - 9 - 12 - - | |
Row 1 - AC primary 1 - 12V AC filament - Chassis ground - +650 VDC
Row 2 - AC primary 2 - VOX 1 - VOX 2 - +250 VDC
Row 3 - Xmit ALC - Chassis ground - Speaker - Bias (ADJ -40 to -80VDC)
Shorting the AC primary 1 and 2 pins together turns the supply on.
All voltages, ALC and Speaker are referenced to chassis ground, Pins 6 & 7.
VOX 1 and 2 are both isolated from ground.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B & C-Line Service Supplement CDs
<www.k4oah.com>
Howard Traxler wrote:
"Howard Traxler" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Hi folks,
I just bought a home-made power supply--that you all no doubt have seen--for
the drake transmitter line. It has a Jones female plug hanging from it.
Wonder if someone could tell me how to count the pins and what I should find
on each one? Would like to know that it's right before I hook it up.
Thanks lots.
73, Howard, WA9RYF
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