[Amps] Brand new updated PS board for Command Technology amplifiers

[A J]

No, a Doc bought it up here.

AJ___ VE3HJ

On 1/21/24 09:46, gudguyham at aol.com wrote:
> AJ did you sell yours to Steve Burnham?
>
>
> Sent from the all new AOL app for iOS 
> <https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661>
>
> On Sunday, January 21, 2024, 9:18 AM, A J 
> <iamfromcanadaalso at gmail.com> wrote:
>
>     I had a Palstar 2500E (3X3CPX800A7) IIRC Paul told me only 6 were
>     made, regrettably sold. No idea how many non E version.
>
>     Many changes were made the power supply it was accessible from a
>     removable bottom panel. An issue with the transformer leads would
>     become loose after about 6-8 months and needed to be re-tightened
>     from the air/ blower vibration. The transformer was also much
>     larger in the Palstar.
>
>     The control circuit was also very fast acting, over grid trip,
>     over plate trip etc.
>
>     No more festoon bulbs !
>
>     The qsk was a bit noisy ( personal opinion).
>
>     Step start used mechanical relays vs the crydom electronic.
>
>     RF deck layout very similar.
>
>     The Palstar 2500E was significantly taller over the Commander 2500E
>
>     Output was ~4400 into the dummy load, lots of overhead.
>
>     Cheers AJ___ VE3HJ
>
>     On 1/21/24 08:17, gudguyham--- via Amps wrote:
>>     Alek, when Kessler took over Commander from Pat Stein he teamed with Palstar and that was a welcomed change that he made. Unfortunately with only one run of amps made it’s anyone’s guest if with the abundance of control changes if any flaws were made there.
>>
>>
>>     Sent from the all new AOL app for iOS
>>
>>
>>     On Sunday, January 21, 2024, 6:56 AM, Aleksandar Petkovic via Amps<amps at contesting.com>  <mailto:amps at contesting.com>  wrote:
>>
>>     Yeah, it is a bit of a pain to get to the HV parts but not too bad.
>>
>>     Phil, VK6GX cut the bottom out of his amp where the parts live while he
>>     had everything apart. He made a new cover plate and now has very simple
>>     access to the power supply.
>>
>>     I was going to do the same to my amp but decided that the amp would
>>     outlive me after I had changed the HV components, so I left it as is.
>>
>>     I actually opened it up again a year later because I bought one of
>>     W8JI's blowers to replace the sick one which was really noisy . . . . .
>>     and I still didn't modify the bottom.
>>
>>     Slow learner.🙂
>>
>>     73, Alek VK6APK.
>>
>>
>>     On 21/01/2024 2:44 am, Rob Atkinson wrote:
>>>     Sounds like the kind of problem that develops with table top ham gear
>>>     that's crammed into a too small cabinet.
>>>
>>>     Several years ago a friend of mine and I got into a Command amp that a
>>>     mutual friend brought to us for repair.  It was the model that had a
>>>     single 3cx800 on HF.  It turned out to be okay (some kind of operator
>>>     error) but we spent enough time on it to take in how it was made, with
>>>     the inaccessibility of the power supply area (caps and diodes).  That
>>>     part of the amp sat in a shield, underneath the band switch and output
>>>     network, and had no access panel on the underside of the cabinet.
>>>     When we got it back together I told the owner to unload it ASAP
>>>     because if a diode or filter cap ever crapped out, the bench time
>>>     needed to get to the power supply and reassemble would make the repair
>>>     four or five times more expensive than it needed to be.
>>>
>>>     73
>>>     Rob
>>>     K5UJ
>>>
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>     -- 
>     Knowledge is Power and Power is Knowledge.___AJ___1967
>