Guy -
VERY nice 'stacks'. ! :-) The good news is that you can 'mix and
match' to find the problem!
Pardon me if I go too far back, but I don't know your level of experience.
1. What signal level, if any, do you get from the CALIBRATOR? If you
do NOT find the calibrator signal, skip down to 4 below. If you DO have
calibrator, then ...
2. You are aware that the TR-7 BANDSWITCH must be on the same BAND (or
higher) than that of the R-7 because of the lo-pass filtering in the TR-7.
3. I would try connecting the R-7 ANT input directly to the MN-2700 to
bypass the TR-7 / L-7completely.
4. If still nothing, then my next suggestion would be to open up the
receiver and reseat all the cards. Probably 95% of the problems with
the 7 Line equipment are 'fixed' by reseating the cards. There just
isn't enough voltage or current going through so many of those contacts
that the slightest bit of corrosion kills them.
73, Garey - K4OAH
Glen Allen, VA
[email protected] wrote:
Hello Gary,
Nice to hear from you. Here are the answers to your questions:
* R7 Antenna switch is on Main/Main;
* The antenna goes through the matching network which goes through
the L75 to end of the TR7;
* I have verified all cables and connections between the R7 and
TR7 and put dioxine....no change!
Your in-depth knowledge of the Drake is well appreciated.
'73
Guy de VE2GBO
PS: As a proud Drake user like you, I am sending you pictures of my 7
collection. So far, I have not seen as TR7A and R7A sold behond the
serial number that I have!!
> Date: Fri, 16 Jul 2010 15:35:57 -0400
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> Subject: Re: [Drakelist] Audio on the Drake R7
>
> Guy -
>
> If the S-Meter is not registering, it's more likely that the problem is
> further up. What position is the R-7 ANTENNA switch in? It's antenna
> comes through the TR-7, so there could be a dirty contact, bad cable,
> etc. in that area.
>
> 73, Garey - K4OAH
> Glen Allen, VA
>
> Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
> <www.k4oah.com>
>
>
> [email protected] wrote:
> > The audio on the Drake R7 has suddenly dropped up to a point where
the
> > S-Meter does not move anymore. There is some audio that comes out of
> > it, but it is very weak. Actually it is less than the TR7 audio. I
> > checked the resistance on the S-Meter and it works fine. I clean some
> > of the contacts with dioxine and saw no differences. Although it may
> > not have a direct link, my transmit signal is still excellent.
> >
> > Please ask any questions if you think would help me solved this major
> > concern of mine.
> >
> > '73
> >
> > Guy de VE2GBO
> >
_______________________________________________
Drakelist mailing list
[email protected]
http://mailman.zerobeat.net/mailman/listinfo/drakelist
