[NJARC] 572B tubes

[pmalvasi at aol.com]

I agree with Joe re the 572;s - fairly pricey and scare but 811's should work in their place altho I think there is a small modification needed... 


-----Original Message-----
From: joseph cro <n3ibx at verizon.net>
To: Scott Roberts <ng19delta at yahoo.com>; NJARC Radio Club <njarc at mailman.qth.net>
Sent: Thu, Jul 2, 2009 6:59 am
Subject: Re: [NJARC] 572B tubes



Just remember 
Reply = Poster
Reply All = Everyone

_________________________________________________________
Scott,
        I have a pair of regular 866A's you're welcome to. They're not the 
AX variety as manufactured by GE, but they should do the job just the same. 
Regarding 572B's, they're pretty hard to come by used since they were 
designed specifically as a "Amateur Radio" type of tube, not used in 
commercial applications. RF Parts in Ca. sells their Chinese made "Taylor" 
572B's for around $50 or so each. I think your best bet would be to contact 
them if you don't get any responses. You could also try QRZ.com in their 
wanted column. Ditto with "Eham.net". You may just get lucky and find 
someone who has a used pair to sell you at a reasonable price.

Best Regards,
                    Joe Cro N3IBX

----- Original Message ----- 
From: "Scott Roberts" <ng19delta at yahoo.com>
To: "NJARC Radio Club" <njarc at mailman.qth.net>
Sent: Wednesday, July 01, 2009 10:14 PM
Subject: [NJARC] 572B tubes


> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
>
> Hi Guys!
> I just found a QST article on how to convert the HT-41 from 7094s to 
> 572Bs- Does anyone have a pair of 572Bs in decent shape to spare? I am 
> hoping to recap & convert my Hallicrafters Super Paperweight into a useful 
> linear amp once again! (I also -still- need a pair of 866AXs for the 
> rectifiers, unless someone has a good mod for them, too...)
>
> Thanks!
> Scott
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