Is their any modulation of the output when you do that? Is there hum, or a
signal (envelope) on the output, if so, you may have some sort of audio
oscillation modulating the output if it is a single sinusoidal it would create
a CW tone. The modulator itself may be unbalanced....good luck with your
troubleshooting.
73, Jim, WD4AIR
________________________________
From: TenTec <tentec-bounces+dufferjames=hotmail.com@contesting.com> on behalf
of ROLAND HOWELL via TenTec <tentec@contesting.com>
Sent: Thursday, June 11, 2020 3:27 AM
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Cc: ROLAND HOWELL <snowy.howell@btinternet.com>
Subject: [TenTec] Argosy 2
Hi all
Thanks to Martin and Dave for the advice so far.
One thing is puzzling me with the radio and that is this, When I switch
to SSB (upper or lower) the radio transmits what ever power level has
been set with the drive control, I have always thought that it only
transmitted with audio is applied via the mic, or have I got it wrong!.
I am wondering if I have additional problems.
The voltage levels on the 4558 appear to be correct, I have changed it
anyway but the voltage on U1 pin 1 is only <3v not what is written, all
other pin voltages are correct.
So more head scratching today ( I must be careful of getting splinters
ha ha).
stay well and happy
73
Snowy G0HZE
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