GERMANIUM Single ended Class A Headphone Amp. - Page 4

Mooly · 13th March 2010, 05:29 PM

Hmmm... I mangled the switch a bit playing around with fitting it. Pity as the red looked rather good. Should have realised that mounting it on the PCB was no good as the slightest movement would cause it to bind and stick. In the end made two brackets from PCB and drilled the front, but not deeply, to provide a good key to epoxy these in place. The switch is then soldered to this... perfect alignment that won't shift.
Listening tests again confirm how right this sounds, and as mentioned how quiet it is. Even when running on mains (charging) it's totally silent, not a trace at all of mains hum/buzz etc which is just as it should be.

So there we go... job done

poynton · 14th March 2010, 04:48 AM

Very neat and tidy !

Are you going to Simon's bash later in the year ?

Andy

.

Mooly · 14th March 2010, 07:58 AM

Thanks... it's one of those projects that just seemed to work out well.

Won't be able to make Sheffield I'm afraid.

Lingwendil · 5th May 2010, 06:04 AM

Very nice work! Good to see someone that's still into Germies these days. Any Idea on a max power output? It'd be cool to scale this up to a few watts to spank some efficient full-range drivers.

Mooly · 5th May 2010, 06:13 AM

Hi... and thank you,
I'm not so sure it would just scale up very well tbh. Suppose it depended just how much power you wanted really, germaniums and class A don't normally go together.
A sort of hybrid using germanium and a FET (lateral) as an output might be an idea.

jaycee · 29th May 2010, 04:06 PM

Just curious where did you get that very nice looking blue case from ?

Mooly · 29th May 2010, 05:26 PM

Hi Jaycee,
The case is one of these,
Box Enclosures - Product

and I got it from CPC early in the year but I have a feeling they stopped doing them.

Mooly · 29th May 2010, 05:37 PM

Farnell seem to do a few, several pages to look at,
Your Search Results | Farnell United Kingdom

jaycee · 29th May 2010, 07:42 PM

Ahh, never thought to look at CPC for enclosures!

Rapid have the Hammond 1455's which look nice. Will probably use one of those, but i like the cool electric blue look of the case you had

ferynov · 30th May 2010, 07:51 AM

Mooly. very interesting ...but the point is how about sound impression? thx

14th March 2010, 04:48 AM	#32
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	Very neat and tidy ! Are you going to Simon's bash later in the year ? Andy . __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

14th March 2010, 07:58 AM	#33
Mooly diyAudio Moderator Join Date: Sep 2007	Thanks... it's one of those projects that just seemed to work out well. Won't be able to make Sheffield I'm afraid. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

5th May 2010, 06:13 AM	#35
Mooly diyAudio Moderator Join Date: Sep 2007	Hi... and thank you, I'm not so sure it would just scale up very well tbh. Suppose it depended just how much power you wanted really, germaniums and class A don't normally go together. A sort of hybrid using germanium and a FET (lateral) as an output might be an idea. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

29th May 2010, 05:26 PM	#37
Mooly diyAudio Moderator Join Date: Sep 2007	Hi Jaycee, The case is one of these, Box Enclosures - Product and I got it from CPC early in the year but I have a feeling they stopped doing them. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

29th May 2010, 05:37 PM	#38
Mooly diyAudio Moderator Join Date: Sep 2007	Farnell seem to do a few, several pages to look at, Your Search Results \| Farnell United Kingdom __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*


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5th May 2010, 06:04 AM	#34
Lingwendil diyAudio Member Join Date: Apr 2008	Very nice work! Good to see someone that's still into Germies these days. Any Idea on a max power output? It'd be cool to scale this up to a few watts to spank some efficient full-range drivers.

29th May 2010, 04:06 PM	#36
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Just curious where did you get that very nice looking blue case from ?

29th May 2010, 07:42 PM	#39
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Ahh, never thought to look at CPC for enclosures! Rapid have the Hammond 1455's which look nice. Will probably use one of those, but i like the cool electric blue look of the case you had

30th May 2010, 07:51 AM	#40
ferynov diyAudio Member Join Date: May 2008 Location: Borneo Blog Entries: 3	Mooly. very interesting ...but the point is how about sound impression? thx __________________ -Best Regards- diy blog

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