Recent content by Vinylbob

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Audio Research service issue

I did try to bend the conductors in the tube sockets, but also did gently bend the tube prongs, on 6550's and on 7308's in my phono preamp. And no damage seemed to have been done. Yes, tubes sometimes make me nervous that I will have a fire, between the heat generated and the probability of tube...
- Vinylbob
- Post #9
- Jul 18, 2013
- Forum: Audio Research Forum
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Audio Research service issue

The amp was a Mark 2, upgraded to Mark 3 in 2001 with new boards, etc. The tubes, by 2011, were all loose, so that I would bend the pins and clean them to try to get better contact. They would have a slight sag and sit at a slight angle. When I sent it to ARC in 2011 for a tube arc, they...
- Vinylbob
- Post #7
- Jul 18, 2013
- Forum: Audio Research Forum
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Audio Research service issue

Hi Bruce! I just found out about this forum, many good posts to read. Started with a Mark 1, then 2 and 3. I'm not in the industry, just a hobby/obsession. Love music.
- Vinylbob
- Post #5
- Jul 18, 2013
- Forum: Audio Research Forum
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Audio Research service issue

MEP, Thanks for the reply. I leave the top off all the time, to release heat and for easier access for biasing. Yes, a lot of screws, especially since you have to pull a side panel off to solder resistors in. I leave the top off my phono preamp too, for easy access. The one time I did my own...
- Vinylbob
- Post #4
- Jul 18, 2013
- Forum: Audio Research Forum
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Audio Research service issue

My VT-100 Mark 3 amp had a tube arc on a 6550C, and took out a small portion of the board in addition to the two resistors that blow when a tube arcs. I shipped it to ARC by Fedex Ground, got there June 13. I enclosed the paperwork from their website, making sure to check the box that I wanted...
- Vinylbob
- Thread
- Jul 18, 2013
- Replies: 15
- Forum: Audio Research Forum