A Panasonic SC-HTB510 was exhibiting unreliable behavior on the keyboard, and not responding to the remote control actions. Removed all screws, visual inspection… The flat cable connecting the main board and the keyboard was half out of the socket. Gently plugged in, all functions recovered, re-inserted into the casing and Read more…
Introduced more than 10 years ago (versions between 2003 and 2006 from what I found online), the Logitech Z-2300 provides 200 watts of total RMS Power, 2 x 40 Watts into eight ohms for the satellites and 120 watts RMS into eight ohms for the sub-woofer. All considered, this system Read more…
Note : PL36 is the equivalent of 6CM5/EL36, albeit with 25V / 300mA filament requirement. Octal Beam Power Tube There aren’t many people having used the 6CM5 / EL36 for audio circuits, but it doesn’t mean I will leave those 40 PL36 resting in their box for too long, despite Read more…
Modifying an electrophoresis generator for lab usage Hoefer PS500XT – Electrophoresis HV power supply modified for tube lab purpose. 500V at 400mA should suffice for many circuit developments. Changes : replace the large on/off/timer switch by an isolated, quick-to-operate, safe switch added a fan on the back, outside of the Read more…
how to fix Motor Run Caps Several tube amplifiers use motor run caps nowadays. These high-voltage capacitors come in large cans. The one on the picture below is 150mm long and 55mm in diameter. I do not like these monsters protruding through an amplifier top-plate, so I hide them inside Read more…
HV and 5k/4+8Ω Leszek Ogonowski design, build and sell beautiful transformers for tube-amplifiers. I received these 3 models a few days ago. I will use them for a single-ended amplifier, along with NOS Telefunken tubes. Specifications power transformer primary : 230 V, 50 Hz secondary 1 : 750 V CT Read more…