Homebrew Amps: Why not GROUND the B+?

[koØm]

Can anyone with enough smarts to homebrew an amp
not design a circuit based on the info already supplied?

The gentleman from across the ocean asked for a couple of diagrams to support your statement; we are still waiting and, we are not going to send you a SASE.

.

[KC2UGV]

Thank you, John. :)

Alas, I haven't figured out how to transfer a file;
if I try to copy & paste, and take it here, it doesn't work. :(

The pi output circuit is conventional, directly connected to the plates,
sans the blocking capacitor, but you need one in the cathode drive circuit
(or maybe couple through a well-insulated toroid transformer).
An RF choke across the output completes the circuit to ground.

Your grid current meter needs to be plastic, as it will be at B-minus potential.
Bias is obtained through a small filament transformer connected bass-ackward
(secondary across the filament; rectified off the primary). T/R bias relay controlled
optically by photo resistor. Main T/R relay (120 VDC) is powered off a 10 watt Zener diode
which is part of the 23 mA bleeder circuit, which also powers the LED's.

Send me an s.a.s.e., and I'll get some detailed diagrams to you.

. . . . . . 73,

. . . . . . . . Jim

Pull image on your screen.
Take screen shot of diagram.
Open MSPaint.
Ctrl-V.
Save, in JPG format.
Upload as attachment.

[W9JEF]

Pull image on your screen.
Take screen shot of diagram.
Open MSPaint.
Ctrl-V.
Save, in JPG format.
Upload as attachment.

Thanks anyway, but all "geek" to me (old dog, new tricks).
My son is the expert; it's his computer (Dell Inspiron, Windows 7).
I hardly ever get to use it (except when he's asleep).

[KC2UGV]

Thanks anyway, but all "geek" to me (old dog, new tricks).
My son is the expert; it's his computer (Dell Inspiron, Windows 7).
I hardly ever get to use it (except when he's asleep).

Display the diagrams on your computer screen.
Hit Atl-PrtScrn.
Open MSPaint (Windows Key + R, and type mspaint).
When paint opens, hit Ctrl-V.
Then, go to File --> Save.
Upload as an attachment.

[koØm]

Thanks anyway, but all "geek" to me (old dog, new tricks).
My son is the expert; it's his computer (Dell Inspiron, Windows 7).
I hardly get to use it (except when he's asleep).

Let's not get side tracked, it isn't about your son or his computer, who made it or, what operating system it is running.

The topic was about Grounding B+ in a HF amplifier; you were asked by your peers to support your statement with documentation.

You could not do this. Instead, you attempted to stall for time with a supercilious request of a SASE for a fellow 3,000 miles away. Cory threw you a lifeline directly instructing you on how to bring your response to this thread; you crawfished out. Cory should send you a SASE requesting payment for his time in attempting to edify you.

In other words:

myth_debunked.jpg
.

[W5BRM]

lol why does this part of the thread remind me of this??

[N2NH]

lol why does this part of the thread remind me of this??

You are not alone. Excellent comparison.

Snipping Tool in Win7, better than screenshots.

But the point is moot, Mel snipped it better. ;)

Bumper?

Yep.

[WØTKX]

Snipping Tool in Win7, better than screenshots.

But the point is moot, Mel snipped it better. ;)

Bumper?

[W9JEF]

Snipping Tool in Win7, better than screenshots.

But the point is moot, Mel snipped it better. ;)

Bumper?

A psycho-schematic?

[kb2vxa]

Why do I get the distinct impression the usual JEF obfuscation is a $5 foot long (afoot for those who don't get Subway commercials) here? If I can do it anybody can, and over on AM Fone if you click on thumbnails you can see them full size.