Hi everyone-
I am new to tubes.
I have a 1960's vintage Schulmerich audio amp (marked Model 6-190E, evidently used with Carillons) that needs four 5881 output tubes, two for each (independent) channel. I have had no luck finding a schematic, it has not been powered on yet, and I have little knowledge of the actual circuit requirements.
At this point I just would like to attempt to repair it enough to work, then later perhaps improve/tweak. This is a learning project. I have replaced all electrolytic caps and done a few other repairs. I need to buy four 5881's for this. Could you recommend which ones and which supplier?
I have been recommended to Bob Dobush, in Ohio, of findatube.com. He has four used US green print black base Sylvania's for sale for $15 each plus postage. His opinion is that they will sound better than the Sovtek 5881's (through yenaudiostore on eBay for about that same price). He is evidently reputable, and checks his tubes, but I am unfamiliar with what that might actually mean in his case, or what to ask. Maybe you could suggest questions for me to ask him?
I don't want substitutes at this time, i.e. 6L6 variants etc, since the amp is designed for 5881's. And please, if you recommend other suppliers, don't use acronyms- I won't know who you are referring to! $15 is probably as high as I would want to go for these, at this time.
The other tubes are: 6SJ7 and 6SN7. Neither the power supply transformer nor the output transformer are marked with any info. The outputs are 8-pin octal sockets, and I suspect has taps for 70V as well as 16ohm and 6ohm (not sure yet).
Different question, if I may; why would an amp like this require two separate power line inputs, one for each channel?
I am new to tubes.
I have a 1960's vintage Schulmerich audio amp (marked Model 6-190E, evidently used with Carillons) that needs four 5881 output tubes, two for each (independent) channel. I have had no luck finding a schematic, it has not been powered on yet, and I have little knowledge of the actual circuit requirements.
At this point I just would like to attempt to repair it enough to work, then later perhaps improve/tweak. This is a learning project. I have replaced all electrolytic caps and done a few other repairs. I need to buy four 5881's for this. Could you recommend which ones and which supplier?
I have been recommended to Bob Dobush, in Ohio, of findatube.com. He has four used US green print black base Sylvania's for sale for $15 each plus postage. His opinion is that they will sound better than the Sovtek 5881's (through yenaudiostore on eBay for about that same price). He is evidently reputable, and checks his tubes, but I am unfamiliar with what that might actually mean in his case, or what to ask. Maybe you could suggest questions for me to ask him?
I don't want substitutes at this time, i.e. 6L6 variants etc, since the amp is designed for 5881's. And please, if you recommend other suppliers, don't use acronyms- I won't know who you are referring to! $15 is probably as high as I would want to go for these, at this time.
The other tubes are: 6SJ7 and 6SN7. Neither the power supply transformer nor the output transformer are marked with any info. The outputs are 8-pin octal sockets, and I suspect has taps for 70V as well as 16ohm and 6ohm (not sure yet).
Different question, if I may; why would an amp like this require two separate power line inputs, one for each channel?
