Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
In Reply to: RE: In the M60 3.3, the cathode follower, V4, is the single in front. posted by ozzyboy on March 28, 2017 at 09:52:55
...use any kind of socket extenders, just find a pair of standard-size RCA or Ken-Rad VT-231s (or TSRPS!) for that position.
Where (rotationally) are you running your preamp's volume control? If it's sort of low and you're 'throwing away' 10 or 20dB of the preamp's Voltage gain, do as I did and buy a pair of Ralph's tube-replacement plugs and replace Vs3 and turn your volume control up 10dB.
Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
With the socket saver there will be enough room to place 3 of the Sophia's across the back row in the M-60's.
I do have many 1950's era RCA's and they do sound good. But, I think the Sophia's add a little more air, dynamics, and increase the soundstage.
I don't know what is inside that CV181-like glass envelope that Sophia uses. If it's a 6SN7 internally, then using them is fine. On the other hand, if it's truly built to CV181 specifications, then keep in mind that the filaments draw 0.95A. That's 50% more current than a 6SN7 filament. If you use 3 or 4 of the Sophia tubes in an M60, it might be stressing the filament supply. Probably using one or two is OK. This issue would be in addition to any issue arising from alteration of the operating points of the tube itself, if it's a CV181.
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: