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Re: [Amps] Commander 2500 Magnum

To: amps@contesting.com
Subject: Re: [Amps] Commander 2500 Magnum
From: Jim Smith <jimsmith@shaw.ca>
Date: Thu, 07 Feb 2013 00:25:18 -0800
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Hi Art

I've got a Palstar HF 2500/HF 2500 Magnum owner's manual Rev 2.3 12 Nov 2009.

According to pg. 23, Tuned Input drawing, the plate choke relay is energized on 10, 15 and 20. Well, it appears to be. The band-switch wafer which selects the various input networks is nowhere to be found on the drawings.

I also have Rev 2.4 04 Mar 2010 which I found on the net. Shows the same thing.

I could send it to you but it's over 6 MB. You should be able to find it by googling palstar hf2500 manual

Can't help you with the rest of it.

73, Jim`VE7FO

On 2/5/2013 1:57 PM, Sellers wrote:
I was changing bands during  a contest recently and didn’t put the AMP in stby. 
 Well I arced the tune cap.
Nice glob of metal.  I replaced the cap with a new one from Oren Elliott.  All 
went till I tried to tune up on
20,15,and 10.  160,80,and 40 work fine, 1500 watts on them all.  On the upper 
bands it will only output
500 watts at best.
The final have to RFC chokes, one that covers 160 thru 20 and the other for 15 
and 10.  The schematics for this
beast are lacking at the best, built by Palstar, I’m wondering if the 15 and 10 
RFC is also enabled on 20, the schematics
show only 15 and 10.  Does anyone have experience with 2500 Magnum and if there 
is a way to defeat the HV
and get the control circuits operating so as to test the HV RFC relay?

Art W3TZ
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