Jack:
Try this: unplug that blue wire on the DR7 that goes to the low pass filter
and ground it. If the display problem stops, deoxit the bandswitch.
If that doesn't solve the problem, try resoldering the 9 pins on the upper
left edge of the DR-7 near U9003. These pins apparently had a flow
Hello Jack,
I fought with a similar problem on a TR7 for some time; it came down to a
thermal intermittent with U9013, part #MC10138, an ECL device. I used freeze
mist around and on the chip and when sprayed , the display normalized. Fifteen
seconds later as it heated up the display was
Jack [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hi Guys,
Thanks for all your input so far. I just spend the last 4 hrs on the
bench and have developed a headache from inhaling flux fumes. hi.
Per some
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Jack -
I think I asked originally, but did the receiver work OK while the
display was malfunctioning? Before you removed the DR-7 and installed
the
Jack [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hi Garey,
Back last winter when it originally failed when the display
went...the RX went.
The display has not stayed up long enough now for me to check the
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Jack -
OK. There are two VCOs. One for frequencies up through 15 MHz and
another from 15 MHz to 30 MHz. If they are properly aligned and just
out
Jack [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hello Fellow Drake Fans,
I finally got around to putting my TR-7 on the bench today. Removed
the top cover and fired her up for the first time since December
Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang
--
On Fri, 3 Aug 2007 15:12:54 -0500, Jack wrote:
If anyone has some sage advise before, I yank the DR-7 and put in the
jumper board in to further isolate
8 matches
Mail list logo
