Don
I would recommend looking at W3AM's web page for his revisions. I found
them helpful with references to other work people have done on the ranger
Byron, W3WKR
It appears that is what will be required. I was hoping to find the exact
resistor to save drilling new holes and such but I don't think that is going
to happen. Thanks to all who provided help and inspiration.
73 Jim
W5JO
You could buy the 25K, use your old clamp to tap at
20K,
with series (say 2 - 10k ) is mounting. Not enough room.
Thanks for the suggestion Jim.
73 Jim
W5JO
- Original Message -
From: Donald Chester [EMAIL PROTECTED]
To: amradio@mailman.qth.net
Sent: Sunday, March 20, 2005 2:41 AM
Subject: RE: [AMRadio] Power Resistor
Try Mouser
PROTECTED]
To: amradio@mailman.qth.net
Sent: Sunday, March 20, 2005 2:41 AM
Subject: RE: [AMRadio] Power Resistor
Try Mouser at www.mouser.com
or at http://www.mouser.com/catalog/621/437.pdf
They have 10K, and 25K at 25 watts or 50 watts adjuatable. Maybe get
a 10K
fixed at 25 watt
- Original Message - From: Donald
Chester [EMAIL PROTECTED]
To: amradio@mailman.qth.net
Sent: Sunday, March 20, 2005 2:41 AM
Subject: RE: [AMRadio] Power Resistor
Try Mouser at www.mouser.com
or at http://www.mouser.com/catalog/621/437.pdf
They have 10K, and 25K
So have I but in this case, surface rust prevents a repair because the other
sliders won't make contact. The wire under the contacts is rusted to the
point the sliders do not work. Thanks for the suggestion Gary.
73 Jim
W5JO
Jim,
I have repaired those resistors by putting a clamp over
Room is the problem Jim. Wish I had just a bit more to do that.
73 Jim
W5JO
Jim,
You could buy the 25K, use your old clamp to tap at
20K, and the new tap for whatever you need. That would
cut the rating to 40 watts however..
Alternatively parallel the 25K 50 watt with a 100K
I have been following the discussion on Jim's problem, and have a similar
quest.
I have been trying to find a 4 watt, 20 k pot. to use in a Ranger power
control circuit as described by W3AM. Have had no luck in finding on. Any
ideas?
Byron, W3WKR
, March 20, 2005 10:31 AM
To: Discussion of AM Radio
Subject: Re: [AMRadio] Power Resistor
I have been following the discussion on Jim's problem, and have a similar
quest.
I have been trying to find a 4 watt, 20 k pot. to use in a Ranger power
control circuit as described by W3AM. Have had no luck
Jim candela wrote:
Byron,
I recall someone in your situation using a lower wattage pot, and a HV
NPN Horizontal output transistor as an emitter follower. A resistor from
emitter to ground is required, maybe 47K 2 watts. You might think about that
option. This transistor will need to be heat
I have received several reply tat suggest using a regular 1/4 or 1/2 watt
pot and a current amplifier horiziontal output traqnsistor (NPN). That
triggered my memory, and I found such a circuit by W3BYM in Electric Radio,
Dec. 2000, that included some other recommened changes for the Ranger.
: Sunday, March 20, 2005 10:31 AM
To: Discussion of AM Radio
Subject: Re: [AMRadio] Power Resistor
I have been following the discussion on Jim's problem, and have a similar
quest.
I have been trying to find a 4 watt, 20 k pot. to use in a Ranger power
control circuit as described by W3AM. Have
This link explains the drive pot replacement for the DX 100 you are speaking
about Jim.
http://www.amwindow.org/tech/htm/drivepot.htm
If it is a drive pot replacement with low current, the transistor should not
need heat sinking; and the article explains how to mount it on a solder
terminal
You could buy the 25K, use your old clamp to tap at
20K, and the new tap for whatever you need. That would
cut the rating to 40 watts however..
Alternatively parallel the 25K 50 watt with a 100K
fixed 10 watt, and you got 20K with an adjustable tap!
You might be able to just
10195
Dothan, AL 36304
- Original Message -
From: Byron Lichtenwalner [EMAIL PROTECTED]
To: Discussion of AM Radio amradio@mailman.qth.net
Sent: Sunday, March 20, 2005 7:42 PM
Subject: Re: [AMRadio] Power Resistor
I have received several reply tat suggest using
Does anyone have a slider adjustable 20K, 50 Watt power resistor in their junk
box. Am in need.
73 Jim
W5JO
From [EMAIL PROTECTED] Sat Mar 19 19:01:16 2005
Return-Path: [EMAIL PROTECTED]
X-Original-To: amradio@mailman.qth.net
Delivered-To: amradio@mailman.qth.net
Received: from
16 matches
Mail list logo
