The RF stage and Mixer plus associated filters. Probably some folks would
toss the LO in that grouping also. Basically it refers to what is in front
of the first IF.
Dennis AE6C
On Wed, Nov 30, 2011 at 10:55 PM, Neil M Califano cchange...@yahoo.comwrote:
Exactly what components constitute
Way back in the early 70s when I worked at Tektronix, we would wash 545s and
the like in a pressure washer booth-if they were REALLY bad. You had to be
really careful where/what you sprayed, else you'd lose thinks like the power
transformer. We then used an airhose to blow the water out as best
Brilliant, Jim. Looks like I've got to add that to my Lowe's list :)
73,
Steve, W1ES/4
-Original Message-
From: Jim Shorney jshor...@inebraska.com
Sent: Nov 30, 2011 9:56 PM
To: drakelist@zerobeat.net drakelist@zerobeat.net
Subject: Re: [Drakelist] Stability Test and FAN
On Wed, 30
The key is keeping it warm but not overdoing it with the heat. Everything left
in a bare chassis can easily withstand a 140 - 150 F soak. At that
temperature, the water and moisture don't stick around for very long.
When I'm in a rush, I'll leave it in for half a day, but normally I get it to
I've been swearing by Simple Green. The Scrubbing Bubbles might be a winner,
as it has an alcohol base - which can dissolve some things that water can't.
BTW, for the PTO I steer clear of washing (except for the vernier) and clean
out the bearing races and worm-screw with IPA and Q-tips,
I've been swearing by Simple Green. The Scrubbing Bubbles might be a winner,
as it has an alcohol base - which can dissolve some things that water can't.
BTW, for the PTO I steer clear of washing (except for the vernier) and clean
out the bearing races and worm-screw with IPA and Q-tips,
I've always considered it to be the first stages that are working with the original frequency that was received by the antenna. That would generally agree with the RF amp and input to the first mixer.
YMMV
Steve, W1ES/4
-Original Message- From: Dennis Monticelli
Running a 220 VAC fans at 120VAC (just plug them in to
the wall outlet) accomplishes the same thing. Quietly
moving air out of the cabinet. I use one on my T4XB all the
time.
220V fans are usually available cheap at ham fests because
no one want them.
73
K1NR
On Wed, 30 Nov 2011 20:07:23
Hi folks,
There's been a post on another list in the last cupla days re: a
different Simple Green, reported to be more user radio friendly than
the regular stuff. The part number for a one gallon container is 13406
and a google search under Simple Green 13406 will yield many hits on
As we all know this has been a hot topic many times on the list. One of my good
friends worked at HP Fullerton cleaning, repairing, and aligning test
equipment. The process was, as described prior, blowing out dust, removing
whose items that water would damage, using a solution of simple green
- Original Message -
From: John Hudson john.hud...@calema.ca.gov
To: anc...@ec.rr.com; w1es1...@earthlink.net
Cc: captc...@flash.net; drakelist@zerobeat.net
Sent: Thursday, December 01, 2011 12:14 PM
Subject: Re: [Drakelist] Baked Drakes
As we all know this has been a hot topic many
baking at heat under 200 degrees for a week.
It's much faster to do it by hand without risking old gear for which a
ready stock of spares doesn't exist on the shop floor stockroom, like it
did at HP.
Just my $0.02 . Old gear takes time. It's a good thing.
John K5MO
Long before I joined this list, I remember hearing about Tektronix' washing
the older scopes. I can remember doing calibrations on some of them and
many had several HV supplies, so it's common sense that you would remove
those before washing.
One guy I worked with worked in Oregon and they
On Thu, 1 Dec 2011 01:00:06 -0800, Dennis Monticelli wrote:
The RF stage and Mixer plus associated filters. Probably some folks would
toss the LO in that grouping also. Basically it refers to what is in front of
the first IF.
I always considered it to be everything between the antenna input
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