diytube.com

Hi,

I'm new on this forum but I have built already built a few tube amp based on existing design.

I have slightly modified the GSG schematic to fit my need with is using the 12AV5GA as output tube and SS power supply.

I looked at the GSG schematic and I'm wondering if the 6SL7 has enough guts to drive the 12AV5GA properly. I have draw a schematic of my SRPP version but kinda wonder how to calculate the value to have the same load line as the original grounded cathode driver layout.

Could anyone help

TIA,
Isophon

Here's a handy free spreadsheet:
www.platenspeler.com/download/tube_pag1_v2.0.xls

Shannon

A couple of us have build stock get*set*go amps with the 6AV5GA and
they sound great - plenty of power. I used the 6AX5 rectifier also.

Thanks for your replies.

Since I'm not 100% certain I will install 2 x 6SL7 and 2 x 12AV5GA therefore I won't be stuck having to drill holes to install an extra 6SL7 once the amp is completed

Rgds,
Isophon

A totem pole 6SL7 can drive an 845 without breaking a sweat:
http://geek.scorpiorising.ca/GeeK_ZonE/ ... pic=4466.0

A *AV5 will be a downright vaction for it.

Cheers!

Hi,

I have 3 different schematics and 1 layout. Could I please have some recommendations/comments...let me know if you see the 4 files.

Thanks for your help.

http://imageshack.us/photo/my-images/80 ... ayout.jpg/

http://imageshack.us/photo/my-images/89 ... ongsg.jpg/

http://imageshack.us/photo/my-images/64 ... thccs.jpg/

http://imageshack.us/photo/my-images/84 ... esrpp.jpg/

Isophon

I built this up back in January, a 6AV5GA SET, with 12AT7 SRPP drivers. These could also use 5965s, 12AV7s, 6414s, 0528s, or 6072s, all easily interchangeable.



All the grim and gory details of my build are posted here:

http://diytube.com/phpBB2/viewtopic.php?t=4576

Since the SRPP tubes already have 12V filament capability, it would be a breeze to use 12AV5GAs - I have several of these whiich I recently bought off e-bay, and they are the same tube, except for the filament voltage.

6SL7s / 12SL7s should also work very well in SRPP, as would 5751s.

OPTs are 3K:8 10 watt Transcendars, though these are essentially made of unobtainium today, they are excellent. an equally good choice could be the One Electron UBT-3, or the James 6112 or 6113, using the 3.5K primary connection.

This amp really exceeded all my expectations, by a large degree

Stepping back to an earlier version, the original 6AV5GA G*S*G:



Its predecessor is a modified G*S*G, which works well with the 6AX5 rectifier, and even better with a plug-in solid state rectifier "replacement" (built into an octal tube base, with two uF4007s, with a 50 ohm, 5W WW rsistor in series with each anode) which delivers higher B+ and lets the tubes reach their true sonic capabilities. Details here:

http://diytube.com/phpBB2/viewtopic.php?t=4551

/ed B

Look here for your 3K OPT ;-)

http://cgi.ebay.ca/Pair-3k-UL-Transcend ... 415b41129b

Thanks for link, I will read one more time...

I was just wondering which would provide best overall sound for Blues or Jazz..the SRPP or CCS or the G*S*G

Thanks,
Isophon

IIRC he used to have a different e-bay seller name (ggaet), so I thought he just went "off the grid" . I also never thought of looking under ebay.ca

Maybe I should hava simply searched for "transcendar".

D'Ohhhhh!!!!!! (where's a Homer Simpson smiley when I need one)

I see that they also have available 5K SE, and 5K and 6.6K PP iron, now

/ed B

Thanks for all the great feedback.

I believe I will build the SRPP with 12AT7, I took the liberty to update SorenJ's schematics based on your mods found here http://diytube.com/phpBB2/viewtopic.php?t=4576

Updated schematics which I will use (Thanks a lot too both of you) can be found here;

http://imageshack.us/photo/my-images/194/112av5se.jpg/

BR,
Isophon

Hi, I am new to the forum! This post is quite enlightening, thanks for sharing so much information guys.
RK