[Amps] Ameritron AL-82/1200/1500 amps mis-wired!

[Réjean Léveillé]

Hi
Step start is for the HV not for the filament. For my AL-1500 I designed my
own filament step start 2-3 sec delay, also this is a good practice to check
the filament voltage and the main input. In my case I got 4.85v and after
the SSR installation at the filament transformer input I got 4.75v to close
to the minimum with 240v a.c without RF output. I decided to double the
secondary wiring and now 4.95 v at tube socket.
Also the wire size for the HV transformer is under size for my taste. I also
double all of them, replaced all electrolyte capacitor for 330 uf/550v even
if the amplifier was almost new. No head room safety and now key down at 2
kw HV will drop 200 volts instead of 600 volts.
73 Rejean va2am

-----Message d'origine-----
De : Amps [mailto:amps-bounces at contesting.com] De la part de Carl
Envoyé : October 14, 2013 2:54 PM
À : w7ry at centurytel.net; amps at contesting.com
Objet : Re: [Amps] Ameritron AL-82/1200/1500 amps mis-wired!


----- Original Message ----- 
From: "Jim W7RY" <w7ry at centurytel.net>
To: <amps at contesting.com>
Sent: Monday, October 14, 2013 9:21 AM
Subject: Re: [Amps] Ameritron AL-82/1200/1500 amps mis-wired!


> Ameritron never offered a kit amplifier. They did supply Heathkit with the

> SB-1000 kit. I'm not sure who did what, but the Heathkit SB-1000 is an 
> Ameritron AL-80A in kit form. Ameritron never sold the kit version.


**  The SB-1000 is a cost reduced AL-80A.


>
> The only Ameritron amplifiers that have this problem are the ones with 
> step start, which are the AL-82, the AL-1200 and the AL-1500. These 
> amplifiers are exactly the same box with just different tubes in them. 
> (Some other small differences for metering and tube warmup timer etc).
>
> The AL-80, AL-80A did not have step start. Neither did the SB-1000.
>
> 73
> Jim W7RY

** According to Ameritron the AL-80B, AL-572, AL-800, AL-800H all have a 
step start.

Carl
KM1H 

_______________________________________________
Amps mailing list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps