GZ33 Rectifier drop?

Psychobiker · 15th February 2008, 10:56 PM

OK, after my previous threads, regarding a 12AX7 and 6v6GT...I threw the toys out of the cot and decided to go with something a little more tried and tested :

http://boozhoundlabs.com/howto/

Instead of using the 6SN7, I'll be using two NOS Brimar 6J5s, and triode-strapping the 6V6GTs.

Duncanamps PSU designer isn't playing ball on Linux at the moment, so here's asking for your help as I can't simulate anything.

How much would the GZ33 lose in such an environment? I've read up to 35V, and wondering if the previous 400-0-400 I specced to order with the 12ax7 design was indeed overkill or not given such a drop and rectification losses would render B+ takeoff at + - 250 (280 w/o 'the drop' from GZ33).

Smoothing will be carried out with a network of 7H and 16uF and 100uF tank caps

Cheers again,

L

Bandersnatch · 16th February 2008, 01:14 AM

hey-Hey!!!,
I have found that with a choke-input PS that the GZ33 delivers B+ in between a GZ34 and 5V4GA. It is a bit higher resistance than a GZ34, though IIRC it can deliver more output current.
cheers,
Douglas

Psychobiker · 16th February 2008, 08:25 PM

They do - about 200mA + IIRC. I guess the only thing to do is actually load on the tubes (which'll take 280v no problem) and adjust resistance values accordingly.

So, taking 400vP-P rectified (RMS losses), leaves 280V DC. All's good!

L

15th February 2008, 10:56 PM	#1
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Montréal QC	GZ33 Rectifier drop? OK, after my previous threads, regarding a 12AX7 and 6v6GT...I threw the toys out of the cot and decided to go with something a little more tried and tested : http://boozhoundlabs.com/howto/ Instead of using the 6SN7, I'll be using two NOS Brimar 6J5s, and triode-strapping the 6V6GTs. Duncanamps PSU designer isn't playing ball on Linux at the moment, so here's asking for your help as I can't simulate anything. How much would the GZ33 lose in such an environment? I've read up to 35V, and wondering if the previous 400-0-400 I specced to order with the 12ax7 design was indeed overkill or not given such a drop and rectification losses would render B+ takeoff at + - 250 (280 w/o 'the drop' from GZ33). Smoothing will be carried out with a network of 7H and 16uF and 100uF tank caps Cheers again, L

16th February 2008, 01:14 AM	#2
Bandersnatch diyAudio Member Join Date: Jul 2003 Location: Ann Arbor, MI	hey-Hey!!!, I have found that with a choke-input PS that the GZ33 delivers B+ in between a GZ34 and 5V4GA. It is a bit higher resistance than a GZ34, though IIRC it can deliver more output current. cheers, Douglas __________________ the Tnuctipun will return

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16th February 2008, 08:25 PM	#3
Psychobiker diyAudio Member Join Date: Jul 2005 Location: Montréal QC	They do - about 200mA + IIRC. I guess the only thing to do is actually load on the tubes (which'll take 280v no problem) and adjust resistance values accordingly. So, taking 400vP-P rectified (RMS losses), leaves 280V DC. All's good! L

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