[Top] [All Lists]

Re: [Amps] 4K Ultra Restoration

To: "'Bob Maser'" <>
Subject: Re: [Amps] 4K Ultra Restoration
From: "Larry N. Carman" <>
Date: Wed, 7 Dec 2005 13:57:54 -0600
List-post: <>
I had three blowers in the junkbox in the attic but no Dayton 2C917. Two
were 115 VAC and one was a 208 VAC. Sorry I couldn't help you out.


I am not sure about the 3CX3000 amp.  The 4KU amp uses a Dayton 2C917 Blower

which spins at 1600 RPM and needs 230VAC.

----- Original Message ----- 
From: "Larry N. Carman" <>
To: "'Bob Maser'" <>
Cc: <>
Sent: Wednesday, December 07, 2005 1:17 PM
Subject: RE: [Amps] 4K Ultra Restoration

> Does the 4k Ultra use the same blowers that Henry put on the 3cx3000a7 RF
> Plasma decks? If so, I may have a spare in the attic. I'll try to dig it 
> out
> today and get the make and model #.
> -----Original Message-----
> From: [] On
> Behalf Of Bob Maser
> Sent: Wednesday, December 07, 2005 11:07 AM
> To: AMPS
> Subject: [Amps] 4K Ultra Restoration
> After doing an inventory of my HV wire, I find that I have 17' of the real
> good stuff - 40KV.  It is not enough to wire up a man-size amp but it will
> be enough for the 4KU.
> Regarding cleaning the tar, I find that Tuff Stuff that can be bought at
> Walmart for under $3 works great and it supposedly wont discolor paint.
> Tarn-X works great for restoring silver plated material but it really 
> stinks
> and you have to watch out for it as it contains acid.
> After finally getting the RF deck out of the upper cabinet, I find that 
> the
> tar deposits are very light.  I don't want to get into removing that group
> of 3 ganged tuned capacitors so I was relieved that they look good enough.
> Cleaning up the chain drive mechanism turned to be a snap.  I'm waiting 
> for
> the Service manual that my good CA buddy W6RU up in B-field sent me. so I
> can make sure that the timing is properly set when the tune knob is 
> turned.
> Still looking for a replacement blower.  I did find the Dayton number 
> 2C917.
> $125 at Grainger but I can't buy from them because I don't have their 
> secret
> handshake.  Does anyone have input as to how noisy the stock blower is in
> the 4KU?  The one I bought was really quiet but when I got inside it 
> turned
> out to be 2 stacked muffin fans that one of the previous owner/klugger had
> substituted.  Maybe he didn't like the blower noise, who knows.
> Anyway, I'd like to get this amp on line before my A78 goes down the road
> later this month. John, W4DJ, you really did a nice job on your A78
> restoration. $400 for a Peter Dahl xfmr  Ouch!!
> Later,
> Bob  W6TR
> _______________________________________________
> Amps mailing list

Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>