170V 64mA AC good for tube I/V ?

Bernhard · 5th June 2005, 04:01 PM

Hi,

recently I removed a very beautiful transformer from a 70's HP counter. It is black and full encapsulated and japanese manufacturer with japanese printing.

There is 170V 64mA AC that was for the Nixie tubes IMHO.
Is it right for a tube I/V stage ?

Other voltages are 18V 1,2A 18V 1,44A 10V 0,24A 12 V 1,2A

+/- 18V --> +/- 15V
12V --> 5V
10V --> -5V

Which tube is best ? E88CC, E188CC, CCa ? The russian ?

In this unit was also an adjustable 10 MHz OCXO sine output "high stability oscillator"made by Motorola with another black encapsulated transformer & PSU pcb.

philbyx · 6th June 2005, 09:33 AM

Hello

Don't forget the 6.3V (or 12.6V) for the heating.

170 V is RMS ?

You have to consider around 7-8 ma by triode.
If tou use the Thorsten's schematic (I/U converter with ecc88), there is two triodes (one tube) on each chanel, then 16 ma by chanel.

http://www.diyaudio.com/forums/showt...960#post546960

170V if RMS, will give 170Vx1.414= 240V, you will lost around 40 V in filtering, then 200 V to feed the tubes, 36 ma for the two chanels, you can try it

Philippe

Bernhard · 6th June 2005, 10:21 AM

Thanks,

maybe I don't need the -5V and can use the 10V AC to get 6,3V DC.

philbyx · 6th June 2005, 11:40 AM

You need 300 ma for one Tube (two triodes) Ecc88.

As you need at least 2 tubes, you will need 600 ma. Your 10 V is only 0.24A.

Philippe

alchemy · 7th June 2005, 01:01 PM

thorsten is the same schematic of the walrus by Kuei Yang Wang?

Bernhard, what dac chip you use please.

Bernhard · 7th June 2005, 01:09 PM

Quote:

Originally posted by alchemy
Bernhard, what dac chip you use please.

N x PCM56 in this case.

alchemy · 7th June 2005, 04:08 PM

N x pcm56, how many

give me your result, i make this for tda1545

5th June 2005, 04:01 PM	#1
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	170V 64mA AC good for tube I/V ? Hi, recently I removed a very beautiful transformer from a 70's HP counter. It is black and full encapsulated and japanese manufacturer with japanese printing. There is 170V 64mA AC that was for the Nixie tubes IMHO. Is it right for a tube I/V stage ? Other voltages are 18V 1,2A 18V 1,44A 10V 0,24A 12 V 1,2A +/- 18V --> +/- 15V 12V --> 5V 10V --> -5V Which tube is best ? E88CC, E188CC, CCa ? The russian ? In this unit was also an adjustable 10 MHz OCXO sine output "high stability oscillator"made by Motorola with another black encapsulated transformer & PSU pcb.

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6th June 2005, 09:33 AM	#2
philbyx diyAudio Member Join Date: Mar 2004 Location: near Paris	Hello Don't forget the 6.3V (or 12.6V) for the heating. 170 V is RMS ? You have to consider around 7-8 ma by triode. If tou use the Thorsten's schematic (I/U converter with ecc88), there is two triodes (one tube) on each chanel, then 16 ma by chanel. http://www.diyaudio.com/forums/showt...960#post546960 170V if RMS, will give 170Vx1.414= 240V, you will lost around 40 V in filtering, then 200 V to feed the tubes, 36 ma for the two chanels, you can try it Philippe

6th June 2005, 10:21 AM	#3
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	Thanks, maybe I don't need the -5V and can use the 10V AC to get 6,3V DC.

6th June 2005, 11:40 AM	#4
philbyx diyAudio Member Join Date: Mar 2004 Location: near Paris	You need 300 ma for one Tube (two triodes) Ecc88. As you need at least 2 tubes, you will need 600 ma. Your 10 V is only 0.24A. Philippe

7th June 2005, 01:01 PM	#5
alchemy diyAudio Member Join Date: Dec 2003 Location: france	thorsten is the same schematic of the walrus by Kuei Yang Wang? Bernhard, what dac chip you use please.

7th June 2005, 04:08 PM	#7
alchemy diyAudio Member Join Date: Dec 2003 Location: france	N x pcm56, how many give me your result, i make this for tda1545

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