[Top] [All Lists]

Re: [Amps] QRO 2500 MARK lll

Subject: Re: [Amps] QRO 2500 MARK lll
From: gudguyham--- via Amps <>
Date: Sat, 16 Mar 2019 22:33:01 +0000 (UTC)
List-post: <>
Sounds like a bad tube

Sent from AOL Mobile Mail
Get the new AOL app:
 On Saturday, March 16, 2019, Bob Gibson via Amps <> wrote:

I have a problem that just came up with my QRO amp..First I blew a 1/2a fuse on 
the bias board..I replaced it turned it back on then a 1/2a fuse blew on the LV 
and bias board again but not the same fuse..Screen voltage is OK and HV is OK. 
When I hit with 10 watts the fault light comes on and kicks the amp off and I 
see the grid current meter go all the way over..I see no burnt parts or smell 
parts...could this be a grid short in one of the tubes? I have pulled the tubes 
and nothing looks bad below..I think I will send the tubes down and have them 
check just to make sure it is not a problem with one of them..Bob W5RG
Amps mailing list

Amps mailing list
<Prev in Thread] Current Thread [Next in Thread>