Are my heat sinks big enough for 300B's?
Everything except the tube sockets is bottom mounted.....
Everything except the tube sockets is bottom mounted.....
Attachments
Last edited:
One other question.....after debugging I'm planning on running a mullard CV378/GZ37 rectifier. Any issues? is a 47uf first cap OK with this rectifier? I cannot locate a datasheet.
PSUDII shows about 20V additional voltage drop compared to a 5AR4.
PSUDII shows about 20V additional voltage drop compared to a 5AR4.
My Tubelab SE Edcor 250V CT PT has a no load voltage of 268V.
With 5AR4 as rectifier, first cap is ASC 2.58uf, then CX14 choke(6H 154ohms), and second cap is 98.5uf ASC, B+ is 278VDC @ 28mA.
With GZ37 as rectifier, first cap is 3.3uf, CX14 choke, and 98.5 ASA cap, B+ is 277VDC @ 27mA.
Hope that this will help with installing the GZ37. I do like the sound of the GZ37 better than the GZ34, at least with my test setup
Lee Hankins
With 5AR4 as rectifier, first cap is ASC 2.58uf, then CX14 choke(6H 154ohms), and second cap is 98.5uf ASC, B+ is 278VDC @ 28mA.
With GZ37 as rectifier, first cap is 3.3uf, CX14 choke, and 98.5 ASA cap, B+ is 277VDC @ 27mA.
Hope that this will help with installing the GZ37. I do like the sound of the GZ37 better than the GZ34, at least with my test setup
Lee Hankins
Maybe just little bit. Mine (300B TSE) is not much bigger than what's pictured and it works.
Are the heatsinks for Q1 & 2 and U2 & 3 mounted to the board or are they hung off of semiconductor leads?
Well, I suppose I'll try them out.....the regulator has thermal protection, correct?
I have other PC CPU heatsink organ donors, so if I can shoehorn in something bigger I'll do it.
They are hung off of the semiconductor leads.
- Status
- Not open for further replies.