Ok so how do I get in touch with him then?
I looked for an e-mail address none to be found.
No issue with replacing the filament transformer I have one I could use.
Yes tested it out of the circuit.
I have no idea about the logic board, there others out there can can be
retrofitted if needed.
AJ___ VE3HJ
On Thu, 2 Dec 2021 22:44:57 +0000 (UTC)
"gudguyham@aol.com" <gudguyham@aol.com> wrote:
> The Palstar version of Commander was always Don Kessler. There was
> about one full run of the line sold and I don’t believe the second
> run ever went into production. I have two of the Palstar 2500’s and
> I had an issue and got no satisfaction. WE are pretty much alone and
> are going to have to fend for ourselves. I haven’t checked the
> schematic but you can sure use a generic transformer for the
> filaments. There are tons of 12.6v transformers out there that with
> a little to no tweaking of the primary voltage you can land 13.2volts
> on the three filaments total. If you use a 12.6. 4 amp rated
> transformer on 1 tube, the filament voltage will be spot on. For 3
> tubes you’ll need a 12amp 12.6v transformer. If it’s a tad higher
> you can tweak the input voltage with a high wattage chassis mount
> resistor. The other option is to see if an old 2500e transformer is
> kicking around. I assume you have throughly tested that transformer
> before you condemned it?
>
> Sent from the all new AOL app for iOS
>
>
> On Thursday, December 2, 2021, 5:08 PM, AJ
> <iamfromcanadaalso@gmail.com> wrote:
>
>
>
> My current issue is with a Palstar 2500E which is a totally different
> beast compared to the previous Commander versions. Only a handful of
> them made according to Paul.
>
> It has three 3CPX800A7's in it. The plate transformer is twice the
> size of the early Commander 2500E.
>
> So make a long story short. . .
>
> Filament trans primary open.
> Filter caps bulged.
> Diodes shorted
> Tube filaments open
> Step start contacts welded.
>
> I have yet to test the plate transformer, I do not have any specs on
> it. There is no part number on it. I have contacted Paul at Palstar he
> has no info as that product line was sold.
>
> I have sent and e-mail to the owner (not positive if I have the
> correct persons info) of the Palstar design; nothing back as of this
> time.
>
> If anyone on here knows how to contact the current owner of the
> Palstar design please let me know off list.
>
> Thanks AJ___ VE3HJ
>
>
> On Thu, 2 Dec 2021 16:19:09 -0500
> "Tim Duffy" <k3lr@k3lr.com> wrote:
>
> > My favorite triode for 1500 watts all day is a single 8877. 4KV and
> > 30 watts drive.
> >
> > Used 8877s exist and are more than capable for long lives. Some of
> > the 8877s at K3LR have date codes from the 70s... still going strong
> >
> > 73
> > Tim K3LR
> >
> > -----Original Message-----
> > From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Peter
> > Voelpel Sent: Thursday, December 2, 2021 4:16 PM
> > To: 'Kim Elmore'; amps@contesting.com
> > Subject: Re: [Amps] Triode Amps
> >
> > Eimac specifies 890W for a single tube at 3.5KV plate voltage and
> > 740W at 3kV.
> >
> > 73
> > Peter, DJ7WW
> >
> > -----Original Message-----
> > From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Kim
> > Elmore
> >
> >
> > The 3-500Z is an excellent tube, but 1500 W isn't reasonably
> > available out of a pair, even at increased plate voltage
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
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