I have the power supply out of covers and the caps and mounts loose. Two of the
eight cap previously changed. At least one 50K 50 watt bleeder appears open. I
plan to replace all caps, diodes and resistors. Not interested in changing
layout of supply or redesigning it physically.
Is there a
This may be the droid you are looking for:
http://www.wb4hfn.com/DRAKE/DrakeArticles/TechTips/ElectrolyticRelacements.htm
73
-Jim
NU0C
On Fri, 17 Jan 2014 18:06:14 -0800 (PST), John King wrote:
I have the power supply out of covers and the caps and mounts loose. Two of
the eight cap
Thanks Jim. That is a wonderful technical article. I will certainly follow it.
I have never soldered brass rod. Is it difficult? Any special solder required?
I really appreciate your assistance. 73, John, K5PGW
On Friday, January 17, 2014 9:50 PM, Jim Shorney jshor...@inebraska.com wrote:
I've never done it. But I may need to in the near future, My L-7PS is still
running on original caps. Clean brass with 63/37 Kester solder and maybe a
little extra liquid rosin flux should work fine. The only thing that may be of
concern with this method is the length of brass rod running along
-Original Message-
From: Jim Shorney jshor...@inebraska.com
To: Drakelist Drakelist@zerobeat.net; John King k5...@yahoo.com
Sent: Fri, Jan 17, 2014 11:57 pm
Subject: Re: [Drakelist] L4B power supply
I've never done it. But I may need to in the near future, My L-7PS is still
running
Subject: Re: [Drakelist] L4B power supply
I've never done it. But I may need to in the near future, My L-7PS is still
running on original caps. Clean brass with 63/37 Kester solder and maybe a
little extra liquid rosin flux should work fine. The only thing that may be of
concern with this method
Just as I have heard all the stories of power supplies being destroyed, my
L4B power supply did just that. Turned on the amplifier just like I always
have heard a big bang and looking to find the noise and then saw the fire.
Turned off the L4B and removed the 220 volt plug from the wall just in
Sent: Wed, Feb 23, 2011 8:23 pm
Subject: [Drakelist] L4B power supply fire!
Just as I have heard all the stories of power supplies being destroyed, my L4B
power supply did just that. Turned on the amplifier just like I always have
heard a big bang and looking to find the noise and then saw
What is the going price for a working power supply for an L4B?
TNX W5BXE
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Drakelist@zerobeat.net
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The going price for an L-4B supply is around $450.00 for one in reasonably
good, unmodified and clean condition. Add more for one that has been
recapped. One question to ask is what condition the HV connector is in. They
are getting hard do find. Also, the HV cable, which appears to be
On Thu, 27 Aug 2009 09:54:55 -0400, kc9...@aol.com wrote:
You got a deal then,,L-4B's in great working and physical condition go for
more like $750+
Well, the Jones connector on the end of the PS cable went up in flames when I
wired the amp for 220 Haven't gotten around to fixing that
I think someone on here was looking for an L4B power supply a few days ago.
http://cgi.ebay.com/DRAKE-L-4PS-POWER-SUPPLY-L-4-L-4B-L7-LINEAR-AMPLIFIER_W0QQitemZ180400555945QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2a00b607a9_trksid=p3286.c0.m14
On Wed, 26 Aug 2009 12:51:46 -0700 (PDT), GALE STEWARD wrote:
I think someone on here was looking for an L4B power supply a few days ago.
years later the
supply needed to be re-built, not hard to do... but I would not want to pay
that much for just the supply.
73 Tim
wb8uhz
--- On Wed, 8/26/09, Jim Shorney jshor...@inebraska.com wrote:
From: Jim Shorney jshor...@inebraska.com
Subject: Re: [Drakelist] L4B Power Supply
To: Drakelist
] L4B Power Supply Burning Smell
Kevin LaHaie [EMAIL PROTECTED] made an utterance to the drakelist gang?
--?
Hello Group?
?
A good friend had his L4B experience a tube short, and she went with a BANG! ?
1 tube went, but he replaced
Kevin LaHaie [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hello Group
A good friend had his L4B experience a tube short, and she went with a
BANG!
1 tube went, but he replaced both tubes, and brought the amp
Kevin GraY [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Have a L4B that I am getting 900 and 1300 plate voltage. Seems to be half
the amount that I should be getting.
Also is there anyway to test a supply to
Kevin GraY [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Can someone give me the email information of the guy that has the capacitor
rebuild units for the L4B Power supplies.
Kevin
[EMAIL PROTECTED]
Sounds like you have it wired for 240V and are running it on on 125V. There are jumpers in the PS and RF deck that must be changed.
If the caps are old I would suggest changing them along with the diodes and resistors, also, change the fuse resistor R-12 to a 3 or 5 watt resistor of the same
Hi Kevin,
Mike Bryce at The Heathkit Shop has a very nice board available to facilitate this. It is available with or without components. There are other ways of accomplishing the recapping, but they will take longer. that method will look original however, since you are restuffing the old caps.
Joe Roth [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Mike sent me this message about making new PCBs for the L4B power supply.
18 of us need it.
Only need about 6 more orders from you guys...
right now, there
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