[ARC5] BC375 and Dave's Excellent Tube Adventure, Part One

[David Stinson]

375 and Dave's Excellent Tube Adventure, Part One
OK... these two used 1625s are expendable so let's push this thing.
But the beam plates are connected to the cathode inside. 
Won't that keep it from working? Who knows.... we'll find out.
Change the bias? No way. Any irreversable circuit change 
is absolutlely forbidden. If it doesn't work, it doesn't work.

Time to mount the 1625 sockets in the 211 bases.
Tie cathode to pin 7.... 
Plate lead with parasitic choke to screen on pin 3.
Grid to pin 4..... man, that's close to the plate lead.
Better dress that as far away in the 211 base as possible....
There! Two of them ready to go. 

First- I'll tune-up the rig on 3890 KC with the 211s so 
I'll be somewhere close. 70 Watts out. Good.
Off with the power and in with the 1625s.
My primary supply is 27 volts... Switch the Primary Source switch
inside the rig to "24" Volts and, since the fil current is different,
that gives me something close to the 12 volts. Nice, red heaters!

(Angle on my sholder; "But that's 1000 Volts on the plates, boy!")
Hmph, David! Is you a man or is you a mouse?
Go for the gusto! 
If it blows-up, you can do like a government contractor; Hide it!
........(cring...) *CLICK!*...... 70 watts out.
(un-Click)...... hmmmm......
*CLICK!*...... 70 watts out. No red plates. 
No smoke. No fireworks. Hmmm! 
OK.... OK.... Let's see about neutralizing.
Switched to "voice" (Angel on my sholder: 
"Wait you dummy! Don't you know about
plate modulation?? You're really pushing your luck!").

"Fortune favors the foolish!" *CLICK!*
...... (whisper...) "hello? hello test?" Audio,
but FMing, of course. Needs to be neutralized.
"Hello hello..." (fiddle fiddle...) "hello hellooooo"
(fiddle fiddle fiddle) .... getting "cocky"...
"hellloooooo HELLOOOOOO....HELL.." "**BOOOM!!**"
(flash flash sizzle sizzle.... as one 1625 takes wing to Tube Heaven...).

ummm.... so.... I guess I should write this up and tell everyone
how it's gone so far, right? 
Even if it does make me look like a DOOFUSS, right??
Naaaaaaaaaaaa!
73 OM DE Dave AB5S