The Amp Garage

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280364274949&ru=http://shop.ebay.com:80/items/?_nkw=280364274949&_sacat=0&_trksid=p3286.m270.l1313&_odkw=280364274+949&_osacat=0&_fvi=1&_rdc=1 or http://tinyurl.com/md7ook GIBSON LES PAUL "REISSUE FLAMETOP" MODEL FROM 1985, STRUCK BY LIGHTNING, NO R...

There is a thread somewhere in here on this.

Measure the (quiescent) voltage drop across each resistor, then divide that by the actual DC resistance of each resistor, and you will get the screen current at idle (its likely to be somewhere between 2mA - 4mA or in that ballpark) Multiply this screen current by the voltage between each screen an...

Looks like Blencowe's book is near publication.
http://www.freewebs.com/valvewizard/

skyboltone wrote:.... and this song is indeed one of them where Waters claims the whole thing. ...
Dan

Gilmour ought to have earned co-writing credits on the solo guitar part alone.
IMO its one of his best efforts, the song relies on it and the guitar fills every bit as much as the introductory bass lick.

Bump. Someone offered new datasheets in a post that has been lost in recent website crash.
Can they kindly repost, thanks.

Seems like a topic I posted asking for an iron supplier in Cincinnati was lost in the site crash.
Can anybody help with name of a stockist of OPTs there that my brother can pick a unit or two up from when he visits US in a couple of weeks.
Thanks.

tubeswell wrote:<snip>
The screen current is only about 2mA tops (not 5mA) in those things.
<snip>

I suppose it must drop for high plate voltages , GEC 6V6 GTA spec it for class AB1 at Isc idle = 5mA and 4ma for Vp= 250V and 285V respectively (Vsc=Vp)
But that's for two tubes I guess.

How did he get that? Here is one method: 20V dropped across the 250 Ohm cathode resistor = 80ma. That is 40ma per tube. Each tube drops 322V, that is, 342V-20V. Each tube dissipated (322V x 40ma) watts = 12.8W This ignores the approx 5mA screen current at idle. Assuming your load is sensible it seem...

For common cathode voltage amps: You do need a graph yes. But it is plate current vs plate voltage. Plate current (y axis) vs plate voltage (x axis) At Current =0 mark in your supply voltage. (i.e. on the x axis) At Voltage = 0 Divide the supply voltage by the resistor value and mark the resultant c...

server shutdown error

server shutdown error

Your question is a little more involved than ohms law on its own. Changing the load resistor changes the conditions on the tube and the tube will behave by changing the current through it. You need to understand the concept of the load line to find your answer. There are many books articles etc on t...

http://www.valvewizard.co.uk/ seems to have fallen victim to Lykos webhosting ceasing to offer internet services.
Here's hoping it turns up somewhere else.

WTF
http://www.youtube.com/watch?v=WNl0sFVi ... re=related