[Top] [All Lists]

Re: [Amps] AL-1200

Subject: Re: [Amps] AL-1200
From: Louis Parascondola via Amps <>
Reply-to: Louis Parascondola <>
Date: Wed, 24 Dec 2014 13:34:06 -0500
List-post: <">>
Yes, make sure the plate transformer is NOT using the green wire instead of the 
brown/white lead.  If the green wire is used it can very well up the HV to 3900 
volts will eventually stress out the filter caps and they will let go.  This is 
exacerbated further buy very high line voltage.  Some people could have up to 
250v.  Also it is prudent to modify the capacitor system to use 10 capacitors.  
I make a homebrew kit with instructions on how to install it to add 2 more 
caps.  Unless the amps blows up right away at turn on there is NOT a problem 
with anything else.  
-----Original Message-----
From: Bob Gibson via Amps <>
To: Amps <>
Sent: Wed, Dec 24, 2014 12:51 pm
Subject: [Amps] AL-1200

 I'm having a problem with a friends al-1200 amp.. He is 80 years old  I'm 71 
and we can not figure this out.. I have replaced the stock P/S board twice.. 
after a short time it blows out.. I have replaced it now with a WD7S HV board 
and again it blows the caps.. I have replaced the step-start board with a W7RY 
board.. still samething.. I headed back up to try to work on this thing again 
this weekend.. any ideas would sure help out..Bob W5RG  Almost 60 years in Ham 
Amps mailing list

Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>