audio-talk

Or ! does a positive bias on the grid reduce the cathode bias by that amount ?

[ Does your remark about 32v being the max suggest that I may have just about got away with 30v? NO ! The 32V Al mentioned would be (presumably !) the voltage to the modules from the PSU board. With a full wave rectifier (cap input) the voltage out is 1.4 X the voltage in ! So 18V in gives about 25...

If you are biasing the valve via the cathode then would not the cathode resistor need to be changed ? Is that now compound bias ?

I thought with fixed bias you did not have a cathode resistor ! My word I'm getting confused again, NURSE !!

There is a good potential divider calculation "tool" here if you need one.

http://www.electronics2000.co.uk/calc/p ... ulator.php

I have not got an "account" as such but have got an account number with RS and I pay with my debit card.

No minimum order or carriage charge.

Mike H wrote:Nope, can't find 'washington audio'

Search for PX25 and up it comes !

http://cgi.ebay.co.uk/Sophia-Electric-P ... 23042a8032

From the wiring diagram on the e-bay advert it looks very much like the 18-0-18 (or whatever voltage) connects directly to the PSU board.

Dave, I don't quite know the procedure, but I and several others here get free standard delivery from RS ! You may have to register with them as a company (D.K. Electronics ?) but it is certainly worthwhile. You are better to ask questions like the last one BEFORE you buy on impulse, and likely get ...

Perhaps it's only folk within the BHFITW triangle (Ashen - Dartford - Bedford) that have the confidence to be so silly online ?







BHFITW = best hi-fi in the world.

Hi and welcome to the forum. I recently made a pair of small speakers for use with the computer and they are powered (normally) by my pair of (modified) Quad 11 amps. There was a thread about the "design" ( :wink: ) here. http://www.audio-talk.co.uk/phpBB2/viewtopic.php?t=1767 The basis wa...

Ah ! I see Feastrex drivers "start" at $2990 per pair !!

I wonder whether Scott could do something similar to take a more reasonably priced Fostex ?

Me too !

This is about the Maiko

http://www.diyaudio.com/forums/full-ran ... -d5nf.html

Ali Tait wrote:Yebbut,we all wanna know,did the hat put you in gryffendor Mr I?

DYM "Gryffindor" ?

Had to look it up, but then I've never read the books or seen the films.

Last one (I promise).

pre65 wrote:AHA !!

Dory Previn -Mythical Kings and Iguanas

Have not heard that for a long time. Must get a copy.What is the album (or CD) called Shane ?

Found the CD on the mat when I got home tonight.

Just as I remembered it - very good !