Help with 5692 line amp

Original Burnedfingers · 14th September 2003, 12:32 PM

I have started work on another line amp in order to use up the 5692 red base tubes that are sitting on my bench. What I have drawn is mostly by memory(and that it fading). Would you mind taking a look at what I have got and suggest corrections and modifications please? Schematic is drawn in handicad.

I haven't done the PS yet. I do have several transformers. a 250-0-250, and a 370-0-370. I would like to incorporate several regulator tubes to achieve a B+ of 250V.
Thanks
Joe

Original Burnedfingers · 14th September 2003, 01:18 PM

I'm trying to send the schematic. It says the file too large?

G · 14th September 2003, 01:57 PM

I had the same problem with the schematics that I drew using ISIS. Download a program called IRFANVIEW (a search on google will turn up the address. Open up your schematic with Irfanview and click on IMAGE and then RESIZE/RESAMPLE. Type in 800 in the highlighted square and hit enter. Then click on IMAGE again and then on SHARPEN. You should be able to save the image a post it at this point. When you save the image save it as a Gif. Hope that helps.

G

Original Burnedfingers · 14th September 2003, 05:38 PM

Half a dozen tries ...all failures

Original Burnedfingers · 14th September 2003, 05:47 PM

it

Original Burnedfingers · 14th September 2003, 05:48 PM

Whoops!!

WRONG PHOTO

fdegrove · 14th September 2003, 08:06 PM

Hi,

Joe,

If you can't resize it with what you've got just mail it to me and I'll do that for you.

Cheers,

Original Burnedfingers · 14th September 2003, 08:33 PM

**

fdegrove · 14th September 2003, 09:05 PM

Hi,

If the image is saved and blown up to 200% it is useable.

From what I see you left R7 and R9 undefined, correct?

C3 is 470µF?

C2 is 0.470µF which for most applications will likely be too small.

C1 however will be a little too big once R7 is defined...which is where you have trouble, I assume?

Cheers,

runeight · 14th September 2003, 11:36 PM

May I ask what you're trying to design to? That is, how much gain, what Zo, etc.

Thanks.

14th September 2003, 12:32 PM	#1
Original Burnedfingers diyAudio Member Join Date: Nov 2002	Help with 5692 line amp I have started work on another line amp in order to use up the 5692 red base tubes that are sitting on my bench. What I have drawn is mostly by memory(and that it fading). Would you mind taking a look at what I have got and suggest corrections and modifications please? Schematic is drawn in handicad. I haven't done the PS yet. I do have several transformers. a 250-0-250, and a 370-0-370. I would like to incorporate several regulator tubes to achieve a B+ of 250V. Thanks Joe

14th September 2003, 01:57 PM	#3
G diyAudio Member Join Date: Apr 2002 Location: Belleville, IL.	I had the same problem with the schematics that I drew using ISIS. Download a program called IRFANVIEW (a search on google will turn up the address. Open up your schematic with Irfanview and click on IMAGE and then RESIZE/RESAMPLE. Type in 800 in the highlighted square and hit enter. Then click on IMAGE again and then on SHARPEN. You should be able to save the image a post it at this point. When you save the image save it as a Gif. Hope that helps. G __________________ Gavin

14th September 2003, 08:06 PM	#7
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	Hi, Joe, If you can't resize it with what you've got just mail it to me and I'll do that for you. Cheers, __________________ Frank

14th September 2003, 09:05 PM	#9
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	Hi, If the image is saved and blown up to 200% it is useable. From what I see you left R7 and R9 undefined, correct? C3 is 470µF? C2 is 0.470µF which for most applications will likely be too small. C1 however will be a little too big once R7 is defined...which is where you have trouble, I assume? Cheers, __________________ Frank

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14th September 2003, 01:18 PM	#2
Original Burnedfingers diyAudio Member Join Date: Nov 2002	I'm trying to send the schematic. It says the file too large?

14th September 2003, 05:38 PM	#4
Original Burnedfingers diyAudio Member Join Date: Nov 2002	Half a dozen tries ...all failures

14th September 2003, 05:48 PM	#6
Original Burnedfingers diyAudio Member Join Date: Nov 2002	Whoops!! WRONG PHOTO

14th September 2003, 11:36 PM	#10
runeight diyAudio Member Join Date: Sep 2003 Location: Texas	May I ask what you're trying to design to? That is, how much gain, what Zo, etc. Thanks.

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