hifigeek1
Responses from hifigeek1
| Has any one tried the Van Alstine st-70 input mod Although I am not familiar with the Van Alstine mod I am familiar with the ST-70. The front end tube of the stereo 70 is the 7199, 6AN8 on the MK lll. That tube really needs to go. It's a medium mu triode/ sharp cut off pentode that's prone to hum... | |
| Can't get proper tube bias per manual Newbee is correct. I would also check the actual bias supply voltage. It's possible that it's low to begin with in which case either resistors or a resistor have changed value. It's possible you have a bad filter capacitor causing the lower than s... | |
| VTL ST-85 Repair Regarding VTL..My mom always would say if you don't have anything nice to say about someone don't say it...That being said, I would check your bridge rectifiers and make sure they are not shorted. It would be helpful if you had a Variac. That woul... | |
| What tubes for ST-70 I have not tried them or tested them so I could not say...G | |
| Audio Research VSi60 int amp OR LS17+VS60 Actually if you don't at ear splitting levels the VS-60 should sound very nice. The four ohm tap on many ARC amps is where the feedback is taken and I would definitely use it. Ninety dB is very efficient and power output shouldn't be a problem. Si... | |
| What tubes for ST-70 Your going to find that the KT-77 has a faster, more aggressive bottom end vs. the EL-34. This is also true with the MK-3 amps when the 6550 is replaced with the KT-88. You will also get a bit more power output out of the KT-77 vs. the EL-34. When... | |
| My MC275 has a clueless sound-change... I would suggest you put the amp back on the floor to see if the "proper" sound returns. This kind of thing can happen with solid state amps. I have a YBA amp that I can dramatically change the sound on by simply changing the material I use under t... | |
| What tubes for ST-70 I would heed the advice of Stonedeaf....The 7199 is a medium mu triode / sharp cutoff pentode that is very prone to capacitance problems when it ages causing hum and premature clipping on one side of the waveform. That is, asymmetrical clipping an... | |
| Audio Research VSi60 int amp OR LS17+VS60 Suggest the VS60/ LS17 combination. I think you will find it's will sound better. I assume the Proac D38's are 87-89 dB/1w@1m. | |
| el 34 tubes for McIntosh mc 60 Those amps don't usually sound harsh. If anything they sounds soft. How old are the tubes currently in there? When was the last time you had them serviced? G | |
| SS Power Amp upgrade Bryston all the way. You gotta love a company that has a 20yr transferable warranty on their products. It's made well. I had one for 8 years and sold it because I got bored with it..lol. Never had an problem with it...G | |
| Quatre dg-250 amplifier Wow that name is truly a blast from the past. I had one in for service a long time ago. It was pretty well built. A lot of room under the cover. Unfortunately, I don't have a circuit diagram for it. I remember visiting Quatre and talking at length... | |
| Can NOS Capacitors be trusted? Just so you know Kirkus the new CE caps for the Dynaco are awful. They are only rated at 55 deg. C and get overheated easily by the 5AR4 that stands next to it. I have tried them repeatedly and they seem to fail after about a year. There are now c... | |
| First Tube Amp: Advice? Keep spare tubes on hand? First off did that tube arc? Are their any burned resistors around the output tubes? Was it always drawing this low bias voltage, or did this just happen? If no resistors are burned possibly swapping the outputs might help to diagnose the problem.... | |
| Help/Advice Choosing SS integrated YBA 201..awesome and pretty to look at as well |