I remember seeing somewhere a list of readings for various points on the board. Of course, I bookmarked it, and of course, lost the bookmark ...
Anyone? Seems like that would be a nice sticky ...
Anyone? Seems like that would be a nice sticky ...
2 posters
ST120 Test Voltages
sKiZo- Posts : 1530
Join date : 2013-04-01
Location : Michigan USA
Bob Latino- Admin
- Posts : 3262
Join date : 2008-11-26
Location : Massachusetts
Look on the schematic in you assembly manual .. There are some voltages on the schematic included in your assembly manual .. Note - those voltages are + or - 10%
Bob
Bob
sKiZo- Posts : 1530
Join date : 2013-04-01
Location : Michigan USA
OK then ... I do remember seeing a checklist though, so if anyone runs across it ... thanx in advance.
FINALLY got around to slipping some juice to the amp ... no explosions, the fire extinguisher remains parked, and good heaters on the drivers. Joy.
Note ... I'm supposed to be seeing 6.1 - 6.5 at the driver board, but it's a steady 7.1 here. Sounds reasonable as I'm seeing almost 124vac out of the wall today. Definitely gonna have to consider running the amp full time off a variac ...
FINALLY got around to slipping some juice to the amp ... no explosions, the fire extinguisher remains parked, and good heaters on the drivers. Joy.
Note ... I'm supposed to be seeing 6.1 - 6.5 at the driver board, but it's a steady 7.1 here. Sounds reasonable as I'm seeing almost 124vac out of the wall today. Definitely gonna have to consider running the amp full time off a variac ...
Bob Latino- Admin
- Posts : 3262
Join date : 2008-11-26
Location : Massachusetts
The check list that you mention is also in the VTA ST-120 assembly manual.sKiZo wrote:OK then ... I do remember seeing a checklist though, so if anyone runs across it ... thanx in advance.
FINALLY got around to slipping some juice to the amp ... no explosions, the fire extinguisher remains parked, and good heaters on the drivers. Joy.
Note ... I'm supposed to be seeing 6.1 - 6.5 at the driver board, but it's a steady 7.1 here. Sounds reasonable as I'm seeing almost 124vac out of the wall today. Definitely gonna have to consider running the amp full time off a variac ...
With 124 VAC off the mains, all your voltages will be higher than normal. If you don't use a variac (set to about 118 VAC) then you will probably have shorter than normal tube life in your amp.
Bob
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