I know Eddy, I was going to mention your recent adventures in my opening
post.
Does it sound like the same issue your PTO had? yours was in a R-4 or
R-4A as I recall, not that it matters.
There was something about a dogbone cap in the PTO. Maybe I should go
back and read that thread, eh?
Bob K6GGO
*/Hi Bob,/*
Don't even /START/me on this topic!!! * : >)*
*/~73~ de Eddy VE3CUI - VE3XZ/*
*********************************************************************************************************
On 2011-10-26, at 10:32 AM, Robert Fish wrote:
Hi Guys,
I have been ignoring an issue with my T-4XC until recently. When I
use the R-4C PTO to control the receiver it seems to work fine.
When I use the T-4XC PTO to control the receiver I get sort of a
chirpy, jumping around of the cw signal I am trying to copy. Both units
work fine in transceive using the R-4C PTO, which is the way I have
been using them. But with the recent DX expeditions (T32C, TX7M)
running split, I have been having to use the C-line as separates to
work them. I have had some success working them, but heaven knows
what my signal sounds like.
I have been putting off fixing this problem as I felt it was probably
the PTO and I haven't been in the mood for performing major surgery
lately.
I decided to get off my arse and do something about it yesterday. So,
I got out the scope and took a look at the T-4XC PTO output while it
was controlling the R-4C.
It seems stable. So I looked at the Plate of V-8 with the scope, I
have a composite signal (PTO, Xtal Osc.) it looks solid as a rock. So
then I looked at the injection signal
right at the jack on the back of the T-4XC and once again, I can hear
a cw signal I tuned in on the R-4C jumping all over the place, while
I'm looking at a rock solid injection sig
leaving the T-4XC. I switch back to the R-4C PTO and the jumping
around stops, the receiver copies the same cw sig with stability.
What am I missing here? It is hard to fix something when it seems
like the only evidence of a problem is coming out of the speaker. If
I could find some evidence of the problem
I could follow it to it's source. This could be operator error
(probably is) I only put about an hour in to this last night as I got
called to dinner and a man has to have priorities.
I am going to dig in to it this morning, I will eventually find the
problem, but maybe you guys can save me some time.
Oh........another clue: When I use the spot function, in CW mode, I
get a warbling sound in the R-4C instead of a solid cw tone when
tuning in the T-4XC sig with the receiver. It seems
sort of intermittant (it switches to a cw tone sometimes and then
goes back to warbling like you get in SSB mode with the spot function.)
Thanks in advance, I hope this long winded post made sense.
Bob K6GGO
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