B
broncoman529
Guest
Hi everyone,
I have a question regarding possible repair on a Courier ML100 Mobile Linear Amplifier(Tube). My linear was made on 12-14-67 and has 2 12JB6 tubes that both glow and have output. I have had success getting out with this amp and so has my friend, But it has a weird problem. You can load and tune the amplifier fine, But there is a squeal that you can hear from inside the amp as you transmit. The pitch of the squeal changes while you are loading and tuning. You cannot hear this squeal at all on transmit over the air, You can only hear it from the amplifier itself. It almost sounds like a relay sticking slightly or something. I have all of the original instructions and schematics that came with it, I even have the original sales flyer if it can help solve my problem. This squeal can be very annoying if you are talking to someone in DX land as the microphone picks up the sound of the squeal coming from the amp if it is to close. I really appreciate all of the old tube stuff and I was wondering if any of you know someone that is a complete professional at repairing old tube linears. I want to keep it as original as possible and not have it hacked up. It is not the prettiest thing and it looks like it may have been mobile during it's life, But it is one of the coolest things in my collection. Any help is greatly appreciated, Thanks all.
<img src=http://home.comcast.net/~shockwav/large-smiley-042.gif ALT=":ideasmly">
Honda CX500 V-Twin
Larry T.
CDX-529 Northwest Connecticut
"The Littlest Station In The Nation!"
</p>Edited by: <A HREF=http://p067.ezboard.com/bworldwidecbradioclub.showUserPublicProfile?gid=broncoman529>broncoman529</A> at: 12/13/04 9:04 pm
I have a question regarding possible repair on a Courier ML100 Mobile Linear Amplifier(Tube). My linear was made on 12-14-67 and has 2 12JB6 tubes that both glow and have output. I have had success getting out with this amp and so has my friend, But it has a weird problem. You can load and tune the amplifier fine, But there is a squeal that you can hear from inside the amp as you transmit. The pitch of the squeal changes while you are loading and tuning. You cannot hear this squeal at all on transmit over the air, You can only hear it from the amplifier itself. It almost sounds like a relay sticking slightly or something. I have all of the original instructions and schematics that came with it, I even have the original sales flyer if it can help solve my problem. This squeal can be very annoying if you are talking to someone in DX land as the microphone picks up the sound of the squeal coming from the amp if it is to close. I really appreciate all of the old tube stuff and I was wondering if any of you know someone that is a complete professional at repairing old tube linears. I want to keep it as original as possible and not have it hacked up. It is not the prettiest thing and it looks like it may have been mobile during it's life, But it is one of the coolest things in my collection. Any help is greatly appreciated, Thanks all.
<img src=http://home.comcast.net/~shockwav/large-smiley-042.gif ALT=":ideasmly">
Honda CX500 V-Twin
Larry T.
CDX-529 Northwest Connecticut
"The Littlest Station In The Nation!"
</p>Edited by: <A HREF=http://p067.ezboard.com/bworldwidecbradioclub.showUserPublicProfile?gid=broncoman529>broncoman529</A> at: 12/13/04 9:04 pm