On Thu, 12 Jan 2012 16:55:19 +1300, jeffers...@xtra.co.nz wrote:
>I wonder what else 'Inrush Current' could affect ?
>I would appreciate any comments anyone would like to make on this topic. After
>all we are dealing with quite old equipment and the more theoretical and
>practical knowledge we h
Hello All,
Congratulations to Mark, N1VQW on his AC-4 Re-build (with the 'Soft Start') and
the subsequent comments by Garey, K4OAH and Dick, KE4NS. Etc. I rather like the
idea of a remote 'Switch Board'. As far as originality of equipment is
concerned could the relay have been mounted outboard
On Wed, 11 Jan 2012 21:14:41 -0600, Steve Berg wrote:
>What sort of magic is going on in this cable? Any
>pointers would be appreciated!
>
Someone may have replaced the cord at some point. Take the bottom off and see
where the wires go.
73
-Jim
--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
I am trying to wire up my old Shure 444D, and find something strange.
According to the manual, there are supposed to be red, white, black, and
shield wires in the coiled cable. That is what shows coming out of the
cable inside the mic base. Red is mic element, shield is also for the
mic ele
The C-line is sold. Thanks to all for the interest.
73, Terry - W8NJR
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There never was an official fan.
I can remember using a 120V muffin fan, slowed down with a huge, honkin'
wire-wound resistor, the first time I used a fan over the finals 25 years
ago. Today, we've got a plethora of 12VDC fans - some with thermistor
control like the one I got at a hamfest for
Time for a scope.
I still think you've got a contact problem somewhere. The switch wafers in the
B's are a big improvement over the A's, but they can still get crudded up.
The fact that you can receive on either the transmitter or receiver suggests a
problem in either the FUNCTION switch, gain
Hi,
Thanks guys for the great response. All very similar. :-)
It's just what I did to my Yaesu FTDX-400 in 1972. The thing got so hot
that you could fry an egg on it. Then I bought a fan, Papst, real robust
German thing. The finals were probably cooler than the rest of the rig.
BOth fan and rig are
Adrian -
You don't need a lot of air. Just a 'gentle breeze' that can be totally silent. Computer fans are
cheap and quiet. Run a noisy one at a lower voltage/
Easiest to sit on top of the cabinet over the PA, _BLOWING UP_. Rubber or foam 'feet' just to
keep it in place and prevent vib
4" "muffin fan" located on top of the case right above the
finals cage, pulling air UP and OUT.
Since you are in Europe, 220VAC fans are the norm and might
be too loud. Try to find a 24VDC fan and run it on 12vdc.
Quietly moves a lot of air.
73
K1NR
On Wed, 11 Jan 2012 21:48:40 +0100
"Adri
Hi Adrian,
My recommendation would be simply to mount whatever you might have right
available atop the rig, so that it's blowing the hot air generated in the final
PA cage OUTWARD...
I did some tests awhile back & shared the results with this Reflector on how
very beneficial the addition of a
Hi,
I never saw a fan as an accessory for the T-4XC. Is there any offical
one? If not, what what you recommend? Size, diamater, where to put it???
TNX
73
--
Adrin P. van Bloois
Antonlaan 104 email: adr...@pa0rda.nl
3701 VG Zeist voice: +31
Or if they reply direct ...just copy drakelist@zerobeat.net
Lee Simmonds
Summit DCS LLC
260-799-4077 Office
260-403-6936 Cell
-Original Message-
From: FJMelick
To: drakelist
Sent: Wed, Jan 11, 2012 12:25 pm
Subject: Re: [Drakelist] Drakelist Digest Drake T4XB No Output
I have bee
Do reply All.
73,
Lee
-Original Message-
From: FJMelick
To: drakelist
Sent: Wed, Jan 11, 2012 12:25 pm
Subject: Re: [Drakelist] Drakelist Digest Drake T4XB No Output
I have been replying to the people that have been kind enough to answer
me but I have been answering them directly
Check with Ron Baker, wb4...@wb4hfn.com
I believe that he had them in the past.
73
K1NR
On Wed, 11 Jan 2012 08:30:36 -0800 (PST)
Jim DiMauro wrote:
> Evan:
>
> I would assume, that among other things, you're trying to
> find a replacement with an equivalent air flow spec
> (CFM). Am I
Garey,
Diode D3 appears to be good..and I checked D1 & D2 while I was at it.
Diode D3:
V10b Cathode side 4.5 volts. And it varies in voltage a lot based on.
NB is off.
SSB signals being rcvd. pulses up a lot with static crashes.
The non-cathode side of D3 is 150 vlots if NB is OFF and 30 vol
I have been replying to the people that have been kind enough to answer me
but I have been answering them directly to their email address. Not sure
how to continue my answers so they appear on the drakelist when that
happens. I want to keep the thread alive so it can help others that may be
I have a Drake L-7 that needs some repair on the loading capacitor (some plates
are shorting on a small sweep of the control) and the plate current meter has
been erratic in its reading. The amplifier is in great shape otherwise, but I
am not able to work on it. Does anyone know of a good repair
Evan:
I would assume, that among other things, you're trying to find a replacement
with an equivalent air flow spec (CFM). Am I correct? I've not been
successful in finding the spec for the original Torin fans that were in my two
L-7s. Is that part of your testing?
I would certainly be ap
This may be obvious to some, but the cheapest cure to the switch problem is to
install an ICL (inrush
current limiter) in the hot lead of the power supply used. This not only
protects the switch but also
makes your tubes last longer. They are available from most of the major
suppliers in a few
Clark,
Be very, very careful on this. Finding the right fan for replacing it is
harder than one would think. Replacing it with an "original" fan is NOT
necessarily a good solution. Right now I'm doing some testing on a substitute.
73,
Evan, K9SQG
-Original Message-
From: Cla
Fred -
Please forward the entire message to keep the thread intact. It helps to be able to go back to see
what has been done.
If you have a scope, close the PTT and check the 5.645 MHz CO signal at the wiper of the BALANCE
pot. -OR-
If you have a general coverage receiver, see if you can
Hi folks:
I've got a Drake L7 with a noisy fan, and I was thinking of replacing it.
Would anybody happen to have one? Thanks!
Clark
KB9SJD
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Fred,
Do you have a scope?
If so, start looking stage by stage to see where the issue is...then
fix that stage.
Since you don't have any Spot...it is before the finals for sure.
73,
Lee
-Original Message-
From: FJMelick
To: drakelist
Sent: Wed, Jan 11, 2012 12:29 am
Subject: Re: [D
FWIW, I found 3 computer switch strips over the past couple years at garage
sales and thrift stores. I didn't pay over $2.50 for any one of them. BTW you
would be surprised the radio equipment you can find in these places as well.
--- On Tue, 1/10/12, Garey Barrell wrote:
> From: Garey Barre
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