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Re: [Amps] 4K Ultra Restoration

To: "AMPS" <>,"Phil Clements" <>
Subject: Re: [Amps] 4K Ultra Restoration
From: "Bob Maser" <>
Date: Sun, 4 Dec 2005 15:33:18 -0500
List-post: <>
Thanks to all who have responded so far.  Does anyone have a spare service 
manual for the 4K Ultra?  If you have a service manual and would be willing 
to have it duplicated I would gladly pay all the costs.

----- Original Message ----- 
From: "Phil Clements" <>
To: "'Bob Maser'" <>; "'AMPS'" <>
Sent: Sunday, December 04, 2005 3:22 PM
Subject: Re: [Amps] 4K Ultra Restoration

>> Can someone tell me what was the original blower used in the 4KU? 
>> Looking
>> at the Grainger catalog, it looks like the only one they sell that could
>> possibly work is the Dayton 4C869, which is 230VAC @ 1600 RPM but I'm not
>> sure of the opening size match.
> The blower # in the 4-K manual is Henry part #00 49101. It is rated at 325
> cfm. It is a 230 volt 1500 rpm unit.
>> The amp was operational when I first saw it about a month ago although it
>> took about 100W to get 1500W out of it so I am going to have to replace
> the 8877.
> The ones I have repaired/operated did 2200 watts with 65 watts drive. If 
> the
> tracking has gone out of adjustment, this would cause low output. You will
> need a service manual to properly adjust all the coils/capacitors to track
> properly from 3-30 mhz. This is not difficult but a little time consuming.
> (((73)))
> Phil Clements, K5PC
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