hifigeek1

Responses from hifigeek1

audio Research REF 110 and KT 120 tubes
Wow I guess my last post never made it on here. Cmalak, the reason I saw the KT-120's is I had to service in warranty a pair of Ref210's and they came with KT-120's. Understand that I can get KT-120's but they would not be ARC KT-120s. ARC runs al... 
audio Research REF 110 and KT 120 tubes
The KT-120 actually can run at a maximum plate voltage of 700-800Vdc! This is a very very robust tube. I have fitted a set in one ARC amp in warranty. It is taller, heavier, and the glass is thicker. Also on inspection, the plate of the tube utili... 
Power Tubes for ARC VT100 MkI. Genalex or SED?
In addition, the KT-120 can not be used as a regulator tube in ARC amps. That job still goes to the Winged C 6550. 
Power Tubes for ARC VT100 MkI. Genalex or SED?
Your amp was voiced with Winged C 6550's. Not a big fan of any KT-88's in an Audio Research Amp. As I said in another thread, I don't believe your going to get 2000 hrs. out of that tube. My suggestion would be to wait, if possible, until the KT-1... 
Buy tubes from Audio Research or not
Yes. it's possible a resistor or resistors may have changed value. Usually when a tube arcs it takes out a resistor. If you feel the need, you might have a qualified technician make sure the resistors around the failed output tube still measure th... 
Aragon 4004 MK II
I've had to service a few over the past years. Great amp. Very well behaved. Good sounding. Nice current delivery. Good bandwidth i.e., frequency response. 
McIntosh MC40 / Eico HF60
Ketchup, Regarding the MC-40 they are nice little amps. If you find a pair try and have them looked at by a qualified technician before you buy them. Those amps are very old and most of them require power supply rebuilding. That can get expensive ... 
Does a tube preamp warm up sound of SS amp?
Ldworet, I think it would totally depend on the preamp. Some tube preamps don't sound particularly tube like. That being said, I would look for a tube preamp that sounds warm and tube like. Can you borrow a few and see which one works best in your... 
Audio Research VS 115 bias Adjustments
Well..see my comments above. Those sonic changes were due to the KT-120. I can only assume it will sound the same in your amp. G 
Audio Research VS 115 bias Adjustments
No I haven't personally however I have received feedback from people I trust. It's great! It should be understood that ARC listens to the tubes for a long time as well as life tests the tubes before they give their ok. If the tube sounded bad, the... 
Audio Research VS 115 bias Adjustments
Bifwynne,The problem is, all ARC tubes are matched for current draw so that all tubes draw the same current. Also the ARC tubes that I use are run for 24 hrs. at bias to cull out the bad ones and to make sure the tube won't majorly drift over time... 
Audio Research VS 115 bias Adjustments
6550, I service ARC equip. 
Audio Research VS 115 bias Adjustments
Bifwynne,I'm on the phone with ARC 2-3 times a week lol. Remember the KT-120 is a new tube so as info. becomes available it will be disseminated. If I hear anything, I will let you know. Happy New Year to you as well. geek 
Audio Research VS 115 bias Adjustments
First off, KT-120's are not available yet through ARC for re-tubing. They are only available for new production. Hopefully this will change in the next few months. If you are concerned about some of your output tubes getting up into the 70mV range... 
Audio Research LS2B: hissing noise from a channel
Sounds to me like it could of been a constant current source/ Fet in that channel.