sKiZo wrote:arledgsc wrote:
Looking good there Skizo. How much heat is coming off the power transformer? Seems you have a lot of heater power demand.
Haven't gone gung ho with the temp probe yet, but I have checked a time or two after an ... "energetic" session, with no seemingly significant increase in btu's. At least it passes the "putting a finger on the iron and not leaving a couple layers of skin" test.
All the tubes used present a heavier load than normal, but no issues so far. Probably helps that I run the thing at around 116vac courtesy of my lil bucker ...
... and I'd think the additional ventilation on the chassis plate helps a bunch.
Also worth mentioning, I ran the KT120's for a long time at 60mV each, and have backed that down to a more typical 55mV. At one point, the higher bias provided more bottom end punch, but that doesn't seem to be the case now that the tubes are well broken in.
On the flip side, I don't expect that my usual heaping helping of dbx bass synth and expansion help the heat situation any, but the amp should be used to that by now ... ;-}
BTW ... is it just me, or does the adapter make this tube look like a bowling trophy?
Skizo - I was wondering why the need to use a bucking tranny down to 116 volts? Isn't Bob's transformer designed around 120VAC? That is only +3 volts away from your source. BTW that amp with the GZ37 & KT-120 look awesome.
Sorry for diverting the topic away from the OP.