Clean those PC board contacts.
- Original Message -
From: dpetersen tds.net
To: drakelist@zerobeat.net
Sent: Thursday, August 11, 2011 12:03 AM
Subject: [Drakelist] TR7 problem
Hello Group:
I am the recent recipient of a Drake TR7 with the PS7 power supply. It has
Dan -
Your symptom is due to the phase-locked loops failing to lock.
First step is to at least unplug and re-plug each card and connector, preferably applying liquid
DeoxIT to all contacts as you go.
If this does NOT clear up all your problems, check the DC voltages, especially the -24 VDC, a
On Wed, 10 Aug 2011 21:03:32 -0700, dpetersen tds.net wrote:
> the frequency (for 20 meters) goes to around 11.5 MHz and starts tuning
> upwards rapidly, finally slowing to a stop after about a minute. 10 meters
> starts at about 26 MHz and scrolls the same way. I can hear signals go by as
> it
Hello Group:
I am the recent recipient of a Drake TR7 with the PS7 power supply. It has
evidently been in its original carton since 1987 and is in pristine
condition. I fired it up to check it out and all seems well except on 20 and
10 meters. When switched to those bands the frequency (for 20 met
Henry,
Some hams have reported solving that problem by simply reseating the
circuit boards.
The DR-7 board is a bit tricky. Be careful not to bump the PBT preset pots
on the front right.
If you can find some Caig DeOxit liquid or spray, wipe it on the male
portion of the contacts, and insert
I have developed a fault in my TR7 relating to the UP/DOWN counters. If I
leave the rig on say 3.750 and switch off, when I next switch on frequently
it reads 2.750. Using the up/down buttons I can obtain only 2.250, 2.750
and 3.250 but not 3.750.
This type of error is repeated on all the other
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