Just wanted to show my new version of the amp...
This is a "baby" KT88, mostly because I did not have Edcor CXEs on hand, so I used GXSE, on which I replaced the bells. As you can see, there are two separate chassis: one for PSU, and one for the amp. The amp is SS rectified, in a CLC-LC-CL configuration: One big choke (200mA) after rectifiers and two chokes (90mA) for each channel. Separate reservoir caps for output stage. Caps for the input stage are on the amp chassis. The PSU also has a voltage doubler running off 5VAC winding for 12V, which I need for VU /circuits/meters.
The amp itself is assembled on a separate chassis. Unlike my other builds, this one has plenty of space to work on, and allowed for much neater layout. I also added a headphone/speaker switch and some circuitry to match low/mid/high impedance headphones. I also added the VU meters (not pictured) and install them in the case. This is my first build of an amp separating the PSU from the amp itself, and I really like the way it came out. I will be building the cabinets for them today/tomorrow...
Interesting thing is that there is zero hum. I listened to the amp around 3:00am this morning, and could not hear even a slightest hint of it from my Cornwalls. This surprised me, as I have not applied any of the standard anti-hum measures: artificial tap for the heaters, did not raise heaters above ground, etc. I wonder if this is because of the PSU/amp chassis separation.
Anyway, just wanted to share, since I have not posted any of my builds lately...
Cheers, Paul