Ok, I'm new here so it may take a little while for me to catch up and I won't be insulted if I'm told that I need to find a more elemtary forum so lets get started. I just got my first ST-70 and set it up to check it out. After replacing one of the the bad 7199 tubes which got rid of an annoying buzz in that channel it played ok except for the volume seems quite low. I say this because I also run a Mcintosh MC240 and though I don't expect the ST-70 to match up, it only produced about 50% of the volume of the MC240. Any suggestions where I start looking?
2 posters
1st ST 70 - Low Volume
Bob Latino- Admin
- Posts : 3276
Join date : 2008-11-26
Location : Massachusetts
Hi Russ,
If the low volume is common to both channels then you have to think of something that is common to both channels. Usually the high voltage DC power supply is common cause of low volume on BOTH channels. This includes the rectifier tube, the quad cap and the resistors on the quad cap. Go to the web page below ..
Dynaco Tube manuals
and download the ST-70 manual. On page 9 of the manual there is a voltage check for the stock ST-70. Do a full voltage check on your amp and let us know what you find?
Bob
If the low volume is common to both channels then you have to think of something that is common to both channels. Usually the high voltage DC power supply is common cause of low volume on BOTH channels. This includes the rectifier tube, the quad cap and the resistors on the quad cap. Go to the web page below ..
Dynaco Tube manuals
and download the ST-70 manual. On page 9 of the manual there is a voltage check for the stock ST-70. Do a full voltage check on your amp and let us know what you find?
Bob
Russ- Posts : 2
Join date : 2011-02-05
Bob
Thanks for your reply. I did download the manual and I will go through the voltage checking procedures. I'll let you know what I find. Thanks for giving me a place to start.
Russ
Thanks for your reply. I did download the manual and I will go through the voltage checking procedures. I'll let you know what I find. Thanks for giving me a place to start.
Russ