Fellow Drake Enthusiasts,
Have a project I'm working on and I find the need for some added brackets, or
rails, that are used to support the capacitor and diode boards in Drake
linears' power supplies like the the L4, L4B, and L7. I don't need the boards,
capacitors, nor diodes. If you
Good Afternoon All:
Back from the summer off..
Fired up the B twins after a 3 month layoff and the frequency of the R4B
is jumping regularly about 16hz. It stays steady and at intervals of
approx 1-2 seconds, jumps 16hz for about a 1/4 second then goes back to
the original. Both the
Sorry. Zener diode in the vfo
Sent from my iPhone
David Assaf, III
On Aug 20, 2010, at 12:28 PM, David Assaf w...@cox.net wrote:
Change the 3zener diade in the CFO
Sent from my iPhone
David Assaf, III
On Aug 19, 2010, at 4:19 PM, pony...@aol.com wrote:
Hi People,
I've got an R4C
Curt -
I don't know what s/n your receiver is, but if it is above 8000 you may
have a bad FET in the PTO.
Also measure the voltage at the input to the PTO (Red or Wht/Red wire)
to see if perhaps it's changing at the same time.
You might also check the BFO frequency to make sure it's not
Jerry -
I don't know about your membership status, but it's easy enough to join.
http://www.zerobeat.net/drakelist/listjoin.html
Yes, a cold, rosin or cracked solder joint IS a suspect. I'm just
trying to narrow down the area rather than just resoldering everything!
:-) It's quite likely
Ok, I bought 4 crystals. Not exactly the ones recommended but close and
cheap. The Preselector peaks at two positions on *most* of the new
crystals. The manual says this can happen. Is there an easy formula that
will tell me low number peak is the below IF freq. and higher numbers are
the
My TR-4 did not want to tune... it caught on fire that looked like it was at
the PA section probably around the relay. All I could really do was grab
switches and plugs faster than anything I've done in the last twenty years.
The smoke was not the conventional electric smell. It was very acid and
Rick,
Sorry to her you had issues with one of our loved ones :-)
Acidic smell sounds like an electrolytic cap. Don't recall if any exist in the
PA area, but if they do they would not be in the cage. There might be
something below the cage under the chassis.
If there was a fire and now it is
I forgot to mention that there was a 2 flame... hence fire. The tune and
load caps were clean as are the coils in the tank. I thought that maybe
something wrapped in paper light up. The flame was by where the relay is. I
would have bet good money that some sign of the fire would be obvious. But
no
It's been my experience when this happens, it is a tantalum capacitor that blew
up. Is there was there one nearby?
Lee, w0vt
- Original Message -
From: Richard Palmer
To: Ron
Cc: Drakelist
Sent: Friday, August 20, 2010 8:37 PM
Subject: Re: [Drakelist] Fire... really
Richard -
The fact that it didn't tune indicates that perhaps the antenna was
either not connected (relay?) or wrong band? or bad coax, or ...
Possibly arcing in the relay contacts or coil.
What is the BIAS current? It should be 100 mA, if it's now 65 mA or so
you may have lost a final
I have tried tuning her up only to find a disconnected coax ( 2 rigs no
switch ). But when it's connected... it goes into a 300w dummy load. I do
have to tune the antenna on air though. I noticed on your great CD, while
looking for a titanium cap, that the relay there is wrapped in what looks
like
12 matches
Mail list logo
