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


Cory Hine cory_hine at yahoo.com
Sun Oct 10 10:52:09 EDT 2004


The 807's are now $15... just had to replace 2 in the
Viking transmitter....
 
Cory/AD5QP

Mark Foltarz <Foltarz at rocketmail.com> wrote:
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 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 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 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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> > > 
> > 
> > 
> > 
> > 
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