His ebay store is "W8JI CTR Engineering All Things Ham"
https://www.ebay.com/str/w8jictrengineeringallthingsham?_trksid=p4429486.m3561.l161211
Matt
KM5VI
-----Original Message-----
From: Amps <amps-bounces@contesting.com> On Behalf Of Aleksandar Petkovic via
Amps
Sent: Monday, February 16, 2026 10:42 PM
To: amps@contesting.com
Subject: Re: [Amps] AL-1500 'thump'
I wasn't aware of his ebay store. Can you provide a link please?
Yes, I have his filter board and the EBM Papst blower in my AL-1500, but I
bought them directly from him. I would like to see the ebay store.
73, Alek VK6APK
On 17/02/2026 12:07 pm, maflukey@gmail.com wrote:
> FYI, W8JI sells upgraded HD capacitor boards, upgraded HD rectifier boards,
> and upgraded soft start boards for the big box Ameritrons on his ebay site.
> IMO they are very well designed, assembled, tested high quality boards that I
> seem to recall Tom describing as the boards that would have gone into the
> AL-1500 had production costs not needed to be considered. The boards have
> several improvements from the originals and are relatively easy to install.
>
>
>
> Matt
>
> KM5VI
>
>
>
> From: Rejean Leveille <rejva2am@gmail.com>
> Sent: Monday, February 16, 2026 2:42 PM
> To: maflukey@gmail.com
> Cc: Steve Bookout, NR4M <steve@nr4m.com>; amps@contesting.com
> Subject: Re: [Amps] AL-1500 'thump'
>
>
>
> Hi
>
> In the past my soft start relay got defective, also with age it may not read
> the right high voltage, easy fix be replacing the Mohm resistance..
>
> Also if the HV was near 3600 volts, there is no safety electrolytic margin at
> 450 volts. All equalizer resistors need to be very close values. If their
> color doesn't look like new then replace them all by ordering twice (16x). to
> pick up the 8x match.
>
> Unless you have some safety experience measuring each electrolyte DC
> voltage then do not do it. The diode pcb needs to be vertically locked
> and insulated
>
> Good luck
>
> Rejean va2am
>
>
>
> On Mon, Feb 16, 2026 at 12:52 PM <maflukey@gmail.com
> <mailto:maflukey@gmail.com> > wrote:
>
> For safety's sake, be aware the soft start and safety interlock on some of
> the AL-1500s were not factory wired per the schematic.
>
> Matt
> KM5VI
>
> -----Original Message-----
> From: Steve Bookout, NR4M <steve@nr4m.com <mailto:steve@nr4m.com> >
> Sent: Monday, February 16, 2026 8:48 AM
> To: maflukey@gmail.com <mailto:maflukey@gmail.com>
> Cc: amps@contesting.com <mailto:amps@contesting.com>
> Subject: Re: [Amps] AL-1500 'thump'
>
> Hello Matt,
>
> I was wrong about the soft start. It IS in the AL-1500.
> My mistake was I asked ‘AI’.
> On the schematic, it’s obviously there (K3 and a 10 ohm R).
>
> Steve NR4M
> Sent from my iPhone
>
>> On Feb 15, 2026, at 8:45 PM, maflukey@gmail.com <mailto:maflukey@gmail.com>
>> wrote:
>>
>> Hi Steve,
>>
>>>> 'If' it had a soft start to deal with initial current surge, I
>>>> might think there was a problem there, but there isn't one.<<
>> Did you remove the soft start relay and inrush resistor? How old are
>> your PS caps and are they original or upgraded?
>>
>> Matt,
>> KM5VI
>>
>>
>>
>> -----Original Message-----
>> From: Amps <amps-bounces@contesting.com
>> <mailto:amps-bounces@contesting.com> > On Behalf Of Steve Bookout
>> Sent: Sunday, February 15, 2026 12:39 PM
>> To: amps@contesting.com <mailto:amps@contesting.com>
>> Subject: [Amps] AL-1500 'thump'
>>
>> Hello all,
>>
>> Had a friend using the station this weekend, and while sitting there with
>> him, while operating on 40 meters, we both heard a 'thump' or 'thungg' from
>> the amp while transmitting. Happened two or three times or a period of a
>> few hours.
>>
>> Reminded me of the sound the current surge makes when you first turn the HV
>> on in an amp.
>>
>> Puzzling to me cuz if that was it, why and why now? And, no other follow
>> up issues. I don't think a PS filter cap would 'sorta, kinda'
>> short, then not and be OK. It would only be a small part of a larger
>> 'event'. (Been there; done that and still remember the pucker factor.)
>>
>> Amp was being operated in a typical fashion, with resonant load, 25 watts of
>> drive, ~ 40 ma grid current, +/- 1200 watts RTTY.
>>
>> Dealt with many amps before, but have not heard anything like this in the
>> past. 'If' it had a soft start to deal with initial current surge, I might
>> think there was a problem there, but there isn't one.
>>
>> Ideas?
>>
>> 73 Steve NR4M
>>
>>
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com <mailto:Amps@contesting.com>
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com <mailto:Amps@contesting.com>
> http://lists.contesting.com/mailman/listinfo/amps
>
>
>
>
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|