Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: archaos on April 01, 2012, 03:03:32 pm

Title: Yet another 5E3...
Post by: archaos on April 01, 2012, 03:03:32 pm
...w/o cab for the moment.

PIN        V1        V2        V3        V4
         12AY7    12AX7   6V6GT   6V6GT
1        111.9      137.5
2           0             0
3           1.6          1.1  329     329
4                                293     293
5                                   0         0
6        113.3       173.5                           
7           0            16.4                     
8           1.6         41.5   17.5     17.5
Title: Re: Yet another 5E3...
Post by: archaos on April 01, 2012, 03:04:50 pm
other pics :
Title: Re: Yet another 5E3...
Post by: rzenc on April 01, 2012, 04:05:13 pm
It's a tight fit....Very nice job...

Just love 5E3's...

Best regards
R.
Title: Re: Yet another 5E3...
Post by: archaos on April 01, 2012, 04:25:12 pm
Thanks ! ;-)
Title: Re: Yet another 5E3...
Post by: Willabe on April 01, 2012, 05:01:46 pm
Very nice work!

It looks like there are 2 diodes in antiparallel across an R&C? What are they for? Are they wired up to the 5Y3 rec? If so, are they before or after it?


                                       Brad         :think1:
Title: Re: Yet another 5E3...
Post by: archaos on April 01, 2012, 05:15:02 pm
Quote
Very nice work!

It looks like there are 2 diodes in antiparallel across an R&C? What are they for? Are they wired up to the 5Y3 rec? If so, are they before or after it?


                                       Brad         :think1:

Thanks !

The pair of 1N4007s are connected in parallel to a hum-loop block network so as to act as a bypass path for serious fault currents. The hum-loop block network is itself connected between the chassis & the power amp star.
Title: Re: Yet another 5E3...
Post by: Willabe on April 01, 2012, 05:53:52 pm
OK, a ground lift. Like in Merlins book.
Title: Re: Yet another 5E3...
Post by: sluckey on April 01, 2012, 06:08:47 pm
Excellent work! And the pics are outstanding! Please tell which camera?
Title: Re: Yet another 5E3...
Post by: PRR on April 01, 2012, 07:02:01 pm
> which camera?

"NIKON COOLPIX L3  COOLPIX L3v1.2" ?

High-class mid-price 2006 model.

I have a cousin, and like it, except sticky settings-button. IIRC $20 at yard sale. ~~$50+ on eBay.
Title: Re: Yet another 5E3...
Post by: Willabe on April 01, 2012, 08:59:07 pm
"NIKON COOLPIX L3  COOLPIX L3v1.2" ?

PRR, how in the heck did you pull that rabbit out of your hat? I"d belive your right, but....      :laugh:
Title: Re: Yet another 5E3...
Post by: TubeGeek on April 01, 2012, 09:39:00 pm
It's easy... just save image to your desktop and then get the info for it.

This is what I can see about your photo...
Title: Re: Yet another 5E3...
Post by: archaos on April 02, 2012, 02:59:15 am
Well-spotted as regards the camera : COOLPIX L3 indeed. Anyway the infos linked to the pics don't lie.  :icon_biggrin:
Thanks for the comments guys.
Title: Re: Yet another 5E3...
Post by: Shrapnel on April 02, 2012, 11:46:47 pm
Well-spotted as regards the camera : COOLPIX L3 indeed. Anyway the infos linked to the pics don't lie.  :icon_biggrin:
Thanks for the comments guys.


Kind of off-topic, but if you don't want people to know things such as where a photo was taken, you'll need to find the setting dealing with (I think) the Geo Metadata and turn if off.
Title: Re: Yet another 5E3...
Post by: olgoat on April 02, 2012, 11:55:49 pm
Very new to all this.  What is the Red screw block to the far left here? (http://www.el34world.com/Forum/index.php?action=dlattach;topic=13550.0;attach=29246;image)
Title: Re: Yet another 5E3...
Post by: archaos on April 03, 2012, 01:58:22 am
Quote
Very new to all this.  What is the Red screw block to the far left here? (http://www.el34world.com/Forum/index.php?action=dlattach;topic=13550.0;attach=29246;image)

Actually I've used an Int'l PT with extra primary and secondary windings, therefore I've put the (somewhat numerous) unused wires inside the screw block.