I assume by Dyna you mean Dynaco? Dynacos are great old amps! Some of the best values in all of audio if you ask me. They can be very musical if taken care of. Well worth repairing and one of the favorite hobbyists amps of all time.
Take a look at www.Curcioaudio.com. Joe Curcio invites you to e-mail him with a description of the problem at his site. He is also a regular at the audioasylum.com DIY tube section. If you ask your question there he is likely to answer you online.
What model Dynaco do you have? I'll assume an st70 as it is the most popular.
There are a number of things you can do to identify and fix the problem like swapping tubes and speaker wire and things like that. I am not going to go through it all because it is all available in very nice manual form at Joe's site. At the first page of Joe's site click on "Doctor Dynaco". At the new page scroll down until you see "Stereo 70 Repair Guide." This guide walks you through step by step method to identify and eliminate hum if you have a ST70.
There may be other guides there for other models but I am not sure.
Be careful poking around because tube amps carry high voltage even when unplugged.
The first thing I would do is read through the manual completely. Then do the simply things advised. Remember that there is lethal voltage even when the amp is unplugged. If you do not fix it post your question at the www.Audioasylum.com diy tube section. You will have narrowed down the possible problems a great deal by going through the process described in the manual and it will be easier to diagnose the problem over the web if it still exists. Joe has been there in the last day or two answering questions about hum and stuff in Dynacos. There are a lot of other folks who know a lot about Dynacos there too. Also you can e-mail him at his site.
If it's not an ST70 look at Joe's site for your model and ask at the Asylum in any event. Let us know what model it is too!
I'll look for you post at the Asylum but I hope all goes well and I don't see it!
Cheers,
I remain
Take a look at www.Curcioaudio.com. Joe Curcio invites you to e-mail him with a description of the problem at his site. He is also a regular at the audioasylum.com DIY tube section. If you ask your question there he is likely to answer you online.
What model Dynaco do you have? I'll assume an st70 as it is the most popular.
There are a number of things you can do to identify and fix the problem like swapping tubes and speaker wire and things like that. I am not going to go through it all because it is all available in very nice manual form at Joe's site. At the first page of Joe's site click on "Doctor Dynaco". At the new page scroll down until you see "Stereo 70 Repair Guide." This guide walks you through step by step method to identify and eliminate hum if you have a ST70.
There may be other guides there for other models but I am not sure.
Be careful poking around because tube amps carry high voltage even when unplugged.
The first thing I would do is read through the manual completely. Then do the simply things advised. Remember that there is lethal voltage even when the amp is unplugged. If you do not fix it post your question at the www.Audioasylum.com diy tube section. You will have narrowed down the possible problems a great deal by going through the process described in the manual and it will be easier to diagnose the problem over the web if it still exists. Joe has been there in the last day or two answering questions about hum and stuff in Dynacos. There are a lot of other folks who know a lot about Dynacos there too. Also you can e-mail him at his site.
If it's not an ST70 look at Joe's site for your model and ask at the Asylum in any event. Let us know what model it is too!
I'll look for you post at the Asylum but I hope all goes well and I don't see it!
Cheers,
I remain