Do you not have a schematic, Shawn?
If not, you can download it here:
www.dj0ip.de/ten-tec-stuff/omni-a-d-manual/
It's not very difficult to determine which transistors are the finals.
They're pasted to the heat sink.
The transistors are Q3 and Q4, MRF 458, and shown in the manual on page 3-52.
The schematic is at the top, a picture (very poor quality) below the schematic.
Unfortunately all of the documentation from back then was strictly black and
white.
73,
Rick, DJ0IP
(Nr. Frankfurt, Germany)
73,
Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec <tentec-bounces@contesting.com> On Behalf Of Shawn Upton via TenTec
Sent: 12 June 2018 03:09
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Cc: Shawn Upton <kb1ckt@yahoo.com>
Subject: [TenTec] Omni D final wiring
Working on an old D that someone else has been into... and before I go too far
I'd like to verify the wiring to the final. A quick look on google does not
reveal what I need: verification of what wire (color) goes where. It does not
look like fun to open up the final.
Radio receives good but when I did a power test I got 20A input (per the 252
PS) and nadda for output. PS tripped out on 40m a couple of times too. I'm
still in the beginning stages of debug, and checking wiring seems wise (wires
on the pass throughs have been removed and reattached--hence the question).
Quick check with an ohm meter shows 100ohm to GND on what i think are the
finals (which bothers me but perhaps it's elsewhere in the radio, as I did not
remove 13V wire), and a diode where I think the bias diode is.
shawn kb1ckt
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