Hoffman AC30 Turret Board

[EL34]

The layout Diagram, Schematic and BOM and other build information can be found on the library page here
http://el34world.com/schematics.htm

Layout and Schematic
http://el34world.com/Hoffman/files/Hoffman_AC30.pdf

BOM - Parts list
http://el34world.com/Hoffman/files/Hoffman_AC30_BOM.pdf

Hoffman Board install instructions

Hoffman Turret Boards are on this page
http://hoffmanamps.com/MyStore/catalog/TurretBoard.htm

Hoffman amps Public parts list page is here
http://hoffmanamps.com/MyStore/catalog/PartsListIndex.htm

[jrdworak]

I've got a Hoffman AC30 board and I'm thinking a 15 watt amp would suit me better. Here's what I plan on changing, please let me know if I'm missing anything.
1. Leave off 2 power tubes and associated parts
2. Use smaller power and output transformers designed for a 15 watt amp
3. Double the resistance on the cathode resistor for the power tubes.
And that's about it, thanks in advance for any help.

[EL34]

Yeah,
That's about the only difference between 2 and 4 power tube amps
Maybe fuse size is smaller also


It would be more along the lines of my Stout without the extra gain stage


http://el34world.com/schematics.htm#Hoffman_Stout_

[pompeiisneaks]

I've got a question on this parts list. I just ordered it and didn't notice it doesn't contain a power transformer nor an output transformer.  The others I'd looked at did.  (Should have paid more attention, I know).  What are the recommended transformers for this build that will make it like a vox?  And why weren't they included in the parts list like the others I've seen? 

[EL34]

I am ordering the AC30 output and Power transformers and putting them in stock


I'll post back here when I have them in the catalog and ready to go

[pompeiisneaks]

Outstanding, I'm thinking I may be ordering them and a few bushings for the chassis holes here after the first of the month as well.

~Phil