CCS for tubes/valves: PCBs - Page 11

planet10 · 16th April 2006, 07:39 AM

I have the boards in hand... after i'm back from the Easter away trip i'll start distributing boards.

dave

jleaman · 16th April 2006, 06:05 PM

Ryssen · 22nd April 2006, 11:33 PM

Quote:

The reference string is the resistor and two LEDs that determine the base (and hence emitter) voltages. You want those constant and known, so it's usually fed from some stable source of DC tapped elsewhere in the amp.

This is from post 44.should I get the reference voltage direct after the rectifier,I take it after a RC filter now,or can I remove the RC filter that I have before the CCS?
Can I use the CCS with MJE340 with a 6B4G?
How?

Original Burnedfingers · 26th April 2006, 11:12 AM

Quote

I have the boards in hand... after i'm back from the Easter away trip i'll start distributing boards.

dave

What is the cost of the boards plus shipping to the US?

EC8010 · 26th April 2006, 01:44 PM

Quote:

Originally posted by Ryssen
This is from post 44. Should I get the reference voltage direct after the rectifier, I take it after a RC filter now, or can I remove the RC filter that I have before the CCS?

Can I use the CCS with MJE340 with a 6B4G?

Keep the RC filter. Although hum on the supply will be attenuated by the potential divider action of R1 and the LEDs, hum on the reference could find its way into the audio.

If you mean could you use the MJE340 variant in the cathode circuit of a 6B4G, then yes.

Ryssen · 26th April 2006, 03:15 PM

Quote:

If you mean could you use the MJE340 variant in the cathode circuit of a 6B4G, then yes.

Yeees....

planet10 · 27th April 2006, 01:37 AM

Quote:

Originally posted by burnedfingers
What is the cost of the boards plus shipping to the US?

1st boards are headed over the Pacific tomorrow :^)

The 1st batch will be $8/board (we are paying the tooling charge, which -- as long as the design doesn't change -- will mean that the cost for the next run could be quite a bit less -- and the order was "small"). This includes a $1 donation to diyAudio/board.

Post to the US (up to 10 boards) is $6 Air/$4.50 surface. All other contries but Canada $7.50 Air/$5.50 surface. Canada is more complex. I can also send a few boards by letter post, but it doesn't get insured so i'd rather not do it that way.

dave

knubie · 11th May 2006, 07:50 AM

So how is progress?
Did the boards survive the pacific flight....

I ordered the minimum 5 set of board's,
when do I pay 5 x $8 + freight too whom

knut

planet10 · 11th May 2006, 07:55 AM

The big group buy is still a ways off... if you want some of the 1st round of boards mail me directly please (those are the $8 ones).

Anyone in the Wiki, i am assumming are waiting for the big batch.

dave

arnoldc · 11th May 2006, 08:47 AM

hi dave,

did mine came with instructions? for a newbie?

16th April 2006, 07:39 AM	#101
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	I have the boards in hand... after i'm back from the Easter away trip i'll start distributing boards. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

11th May 2006, 07:50 AM	#108
knubie diyAudio Member Join Date: Jun 2005 Location: Bergen	So how is progress? Did the boards survive the pacific flight.... I ordered the minimum 5 set of board's, when do I pay 5 x $8 + freight too whom knut __________________ If it's stuck, force it... If it breaks, what the hell, it needed replacement anyways.... Amateurs fixing a fault: they succeed but then discover another fault in addition to the part they just broke....

11th May 2006, 07:55 AM	#109
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	The big group buy is still a ways off... if you want some of the 1st round of boards mail me directly please (those are the $8 ones). Anyone in the Wiki, i am assumming are waiting for the big batch. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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