I have secured a couple of pair of YO186 and some
1940's Sylvania 45's to play with. I wish the YO186 were easier to come
by but I think that I now have enough for me to get a very good idea of the
capabilities of the tube and circuit, and how they will suit my objectives.
Still, I
am thinking about the 10Y/801A/VT25/VT62. Romy, I understand that to
bring the 10Y into Melquides I would need 7.5V for the filaments and about 400V
for the plate. Plate resistance is higher in the 10's, 5k compared to
about 1.2k-1.6k for YO186/45, and I am not sure how this would affect operation
of the Milq circuit particularly interstage coupling. Reading up I have
noticed that some guys prefer much more primary impedance in the OPT than the
10k specified in the 10Y datasheet, up to 16k in fact. Of course this is
in the context of a full-range implementation but I notice that the David
Slagle OPT that you use for MF has a 9k primary impedance (if my memory serves
me right), which is getting near there already.
I have
noticed that you have written about your interest in the 10Y, and I am for sure
no circuit designer, but given your experience with Milq perhaps you could
share some of your thoughts about the viability of putting this tube into the
Milq for MF. Compared to the 45, I am not sure what extra the 10Y would
bring as far as sound is concerned (I can only go on "impressions" of
other people with other systems using the tubes differently), but seeing as
though I will be starting from scratch with my DSET I would be able to add the
required voltages for 10Y upfront so long as it does not look too difficult to
get the tube to work with 6E6P. |
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