|3rd May 2012, 04:27 AM||#1|
Join Date: May 2009
Tubelab SE with tubes outboard
I built the Tubelab SE with 45 triodes and a SS rectifier. All the tubes were installed on the chassis. Be careful if you do the same thing:
Install the stopper resistors close to the grid pin. 3.3k was enough for the 5842 and the I didn't change the 100R of the 45.
I had to add separate power supply and transformer for the 45 filaments to avoid noise (soft start using LT1084).
Since I had a little hum, more filtering was necessary (few hundreds microfarads) for the B+ supply. I had in mind to use stacked Zener diodes with a HV MOSFET for regulation and slow start: it works well.
Next step: the 211 stage!
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Tubelab SE vs Simple SE||Pez||Tubelab||25||29th October 2011 03:16 AM|
|Tubelab SE - XLS tubes||jrobson||Tubelab||14||30th August 2011 07:21 AM|
|FS: Tubelab SE board, components, Mundorf caps, and tubes||sbelyo||Swap Meet||6||21st April 2011 04:10 PM|
|Tubelab SE for other tubes||Nikon1975||Tubelab||1||16th February 2010 06:52 PM|
|Tubelab SE with 45 tubes only||operksoy||Tubes / Valves||13||15th December 2009 07:16 PM|
|New To Site?||Need Help?|