[Amps] SB-220 had two

[Charles Harpole]

Heath SB-220/230 used TWO 3-500z.



Charles Harpole k4vud at hotmail.com 

 

 




 
> From: km1h at jeremy.mv.com
> To: fortra at siol.net; taurusshoguy at yahoo.com; amps at contesting.com
> Date: Wed, 1 Jul 2009 20:58:21 -0400
> Subject: Re: [Amps] 8873 Amp
> 
> Since the plate xfmr and heat sink barely handles one tube I dont believe 
> that Heath ever offered a 2 holer. For any contest style operating a fan on 
> the heatsink is just about mandatory. What some hams or CBers attempt is a 
> different story.
> 
> Carl
> 
> 
> ----- Original Message ----- 
> From: "Fortra" <fortra at siol.net>
> To: "Carl" <km1h at jeremy.mv.com>; "Donald Fox" <taurusshoguy at yahoo.com>; 
> <amps at contesting.com>
> Sent: Wednesday, July 01, 2009 5:48 PM
> Subject: Re: [Amps] 8873 Amp
> 
> 
> > Hi Carl and Roger,
> >
> > that is likely, that Heahtkit did some "odd" things at the Amateur end 
> > era!
> > Remebered once a bid on ebay, for Heathkit SB 240 !!
> > Must have pictures on the other computer.
> >
> > The two holer 8873 was also project published in ARRL handbook in 70's.
> > And Roger if you look for substitues, i have seen some conversion with 
> > GI7B instead of 8873!!
> >
> > Good luck with SB 230!
> >
> > Nermin S58DX
> > ----- Original Message ----- 
> > From: "Carl" <km1h at jeremy.mv.com>
> > To: "Donald Fox" <taurusshoguy at yahoo.com>; <amps at contesting.com>
> > Sent: Wednesday, July 01, 2009 11:31 PM
> > Subject: Re: [Amps] 8873 Amp
> >
> >
> >> The Henry is the only 2 holer Ive ever seen or heard of also.
> >>
> >> Carl
> >> KM1H
> >>
> >>
> >> ----- Original Message ----- 
> >> From: "Donald Fox" <taurusshoguy at yahoo.com>
> >> To: <amps at contesting.com>
> >> Sent: Wednesday, July 01, 2009 4:02 PM
> >> Subject: [Amps] 8873 Amp
> >>
> >>
> >>> The only amp I am aware of that used a pair of 8873's was the Henry 2K
> >>> Ultra.
> >>>
> >>> There are a fair number of them around today if you look in the right
> >>> places.
> >>>
> >>>
> >>>
> >>>
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> >
> > 
> 
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