Projects for next hollidays (the world smallest VBITNGC??) - Page 3

PMA · 21st December 2004, 08:23 PM

Quote:

Originally posted by Upupa Epops
Franz, in this small chassis are " directly heated " LM chips . Use higher anode voltage than at last time, you will get lower distortion .

The distortion makes amps very musical, and people love it.

. So high distortion level is greatly appreciated.

Franz G · 21st December 2004, 08:31 PM

This is good, Upupa: DHLMC, direct heated LM-chips

Ohhh, I played a lot with different anode voltages with the E88CC and I think, I know now, what I prefer

Franz

P.S.
Don't forget: this is a fun project, like this audion radio, using DF651 tubes:

Upupa Epops · 21st December 2004, 08:39 PM

Are this phones " custom made " for Wermacht ?

phase_accurate · 21st December 2004, 09:45 PM

I inherited a pair of these (from my father) as well. They were from a Telefunken crystal receiver and must be pre WWII.

Regards

Charles

Franz G · 21st December 2004, 10:05 PM

This are very sensitive crystal (!) headphones. The brand is Brush, out of USA of the 30ies of last century.

It is my most sensitive headphone, much more than my 4000 Ohm Telefunken, I inherited from my father :-)

BTW, back to the topic:

It will fit in the small box, as it seems.

Franz

troystg · 21st December 2004, 10:14 PM

Hey Franz-

Holly cow!!

Earlier today you posted the following:

"I am preparing a pcb and of course: fitting in all parts will be a challenge, as I did not find any SMD tube sockets .

Franz"

And now you have a completed PCB!!

That was like 6 hr service? How did you have it made so quickly, and did you have extra made?

Upupa Epops · 21st December 2004, 10:15 PM

Franz, are you building U - boat ? Or have you too small flat ? Why do you need this toy ?

Where have you resistors ? And filter caps for tube ?

troystg · 21st December 2004, 10:18 PM

Upupa-

I suspect SMD on the bottom.

Franz G · 21st December 2004, 10:23 PM

Quote:

And now you have a completed PCB!!

That was like 6 hr service? How did you have it made so quickly, and did you have extra made?

I made it in the meantime! Recycled another board in Corel Draw, printing on glossy ink jet paper with the laserprinter, transfering with the iron, edging (wrong word?) with "Eisenchlorid III" (dont know the word).

And this will be the power humpty:

Good Night!
Franz

Edit: Wanna see the board? Not professional, but it will work:

Upupa Epops · 21st December 2004, 10:25 PM

I think that Franz don't like SMD's

.

21st December 2004, 10:14 PM	#26
troystg diyAudio Member Join Date: Apr 2004 Location: Lousy Anna	Hey Franz- Holly cow!! Earlier today you posted the following: "I am preparing a pcb and of course: fitting in all parts will be a challenge, as I did not find any SMD tube sockets . Franz" And now you have a completed PCB!! That was like 6 hr service? How did you have it made so quickly, and did you have extra made? __________________ Troy Thinking positive doesn't make things better, it makes you a better person.

21st December 2004, 10:18 PM	#28
troystg diyAudio Member Join Date: Apr 2004 Location: Lousy Anna	Upupa- I suspect SMD on the bottom. __________________ Troy Thinking positive doesn't make things better, it makes you a better person.

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21st December 2004, 08:31 PM	#22
Franz G diyAudio Member Join Date: Jun 2004 Location: Bern / Switzerland	This is good, Upupa: DHLMC, direct heated LM-chips Ohhh, I played a lot with different anode voltages with the E88CC and I think, I know now, what I prefer Franz P.S. Don't forget: this is a fun project, like this audion radio, using DF651 tubes:

21st December 2004, 08:39 PM	#23
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	Are this phones " custom made " for Wermacht ?

21st December 2004, 09:45 PM	#24
phase_accurate diyAudio Member Join Date: May 2002 Location: Switzerland	I inherited a pair of these (from my father) as well. They were from a Telefunken crystal receiver and must be pre WWII. Regards Charles

21st December 2004, 10:05 PM	#25
Franz G diyAudio Member Join Date: Jun 2004 Location: Bern / Switzerland	This are very sensitive crystal (!) headphones. The brand is Brush, out of USA of the 30ies of last century. It is my most sensitive headphone, much more than my 4000 Ohm Telefunken, I inherited from my father :-) BTW, back to the topic: It will fit in the small box, as it seems. Franz

21st December 2004, 10:15 PM	#27
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	Franz, are you building U - boat ? Or have you too small flat ? Why do you need this toy ? Where have you resistors ? And filter caps for tube ?

21st December 2004, 10:25 PM	#30
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	I think that Franz don't like SMD's .

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