I have a pair of Gulbransen organ amp monoblocks (APS-10 and APS-13). Both are running a set of 6BQ5s in PP at 340V.
How can I test or calculate to see the load these transformers will support. I would like to use them to run two sets of 6BQ5s or 6V6s for a stereo amp. If size matters they are large.
Thanks
Tom
How can I test or calculate to see the load these transformers will support. I would like to use them to run two sets of 6BQ5s or 6V6s for a stereo amp. If size matters they are large.
Thanks
Tom
You need to load the transformer up - a series of household lightbulbs will do it.
Keep increasing the load on hte transformer until you have around a 15% drop from the open circuit voltage eg if the OC voltage was 380VAC, your maximum continuous load current should be at a voltage of 380 x 0.85 = 325.
You should run the transformer under this load for an hour or so to check that it doesn't ovrheat -no more than 55-60 degrees C, but the cooler, the better!
Bear in mind that these are generalisations and rules of thumb. Apply your own level of caution or indescretion!
Keep increasing the load on hte transformer until you have around a 15% drop from the open circuit voltage eg if the OC voltage was 380VAC, your maximum continuous load current should be at a voltage of 380 x 0.85 = 325.
You should run the transformer under this load for an hour or so to check that it doesn't ovrheat -no more than 55-60 degrees C, but the cooler, the better!
Bear in mind that these are generalisations and rules of thumb. Apply your own level of caution or indescretion!
- Status
- Not open for further replies.