[AMRadio] Re: [Boatanchors] 1625 tube, 807, 837


Mark Foltarz Foltarz at rocketmail.com
Sun Oct 10 09:13:26 EDT 2004


Interesting information! I learned something new.

It seems as though there are  still plenty of the 807s around while the 837 is
a little more scarce. Think I'll keep the dozen or so I have as spares for the
art13s and the TBW xmtr here.

de KA4JVY

Mark




--- Brian Carling <bcarling at cfl.rr.com> wrote:

> Don't believe the specs on the 837.
> I had one of those P&H linears with four 837s and two 816s.
> They will put out plenty of power. It was rated for 
> 800W p.e.p. input and would do it. Don't try that with 807s.
> Oh you could... I am just saying that the 837 is a 
> very decent power tube!
> 
> On 9 Oct 2004 at 5:03, Mark Foltarz wrote:
> 
> > Thats the problem with this hobby. It cost too much OONEY...
> > HI
> > 
> > Mark
> > 
> > 
> > --- Glen Zook <gzook at yahoo.com> wrote:
> > 
> > > From the P&H Electronics advertisement on page 144 of
> > > the November 1960 issue of QST:
> > > 
> > > NEW modern styling!  NEW high efficiency 3 element
> > > band-switching pi net.  Puts more power into any
> > > antenna or load from 50-70 ohms.  For SSB, DSB, Linear
> > > AM, PM, CW and FSK.  All bands 80-10 meters.  May be
> > > driven to 800 WATTS PEP with popular 100 watt SSB
> > > exciters.  Uses four modified 1625's in grounded grid.
> > >  On customers order, will be furnished with 837's. 
> > > (note:  1625's and 837's are not directly
> > > interchangeable, since sockets are different.) 
> > > Typical P&H Low Z untuned input.  TVI suppressed. 
> > > Parasitic Free.  Meter reads grid drive, plate
> > > current, RF amps output.  Heavy duty power supply
> > > using 816's.  NEW modernistic grey cabinet measures
> > > approx. 9" x 15" x 10 1/2".  Panel is recessed.  WANT
> > > TO SAVE OONEY?  BUY IT IN KIT FORM.  It's a breeze to
> > > assemble and wire.  BEFORE YOR BUY - SEE THE NEW
> > > LA-400 AT YOUR DEALERS.
> > > 
> > > P&H was out of Lafayette, Indiana (Purdue University
> > > is in West Lafayette).
> > > 
> > > The 837 was definitely used in linear amplifiers in
> > > place of the modified 1625s.
> > > 
> > > Also, the punctuation, spelling, etc., in the above
> > > quotation is exactly from the advertisement although
> > > they did violate some rules of English writing!
> > > 
> > > Glen, K9STH
> > > 
> > > 
> > > --- Mark Foltarz <Foltarz at rocketmail.com> wrote:
> > > 
> > > I don't think it was the 837 however. 
> > >  
> > > I recently had to look up specs on the 837 for a TBW
> > > transmitter I put on the air. 
> > >  
> > > I was suprised to see how weak the 837 is compared to
> > > the 807 - much less power from a 837.
> > > 
> > > 
> > > =====
> > > Glen, K9STH
> > > 
> > > Web sites
> > > 
> > > http://home.comcast.net/~k9sth
> > > http://home.comcast.net/~zcomco
> > > 
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