170V 64mA AC good for tube I/V ? - diyAudio
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Old 5th June 2005, 05:01 PM   #1
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Default 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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Old 6th June 2005, 10:33 AM   #2
philbyx is offline philbyx  France
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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
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Old 6th June 2005, 11:21 AM   #3
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Thanks,

maybe I don't need the -5V and can use the 10V AC to get 6,3V DC.
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Old 6th June 2005, 12:40 PM   #4
philbyx is offline philbyx  France
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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
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Old 7th June 2005, 02:01 PM   #5
alchemy is offline alchemy  France
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thorsten is the same schematic of the walrus by Kuei Yang Wang?

Bernhard, what dac chip you use please.
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Old 7th June 2005, 02:09 PM   #6
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Quote:
Originally posted by alchemy
Bernhard, what dac chip you use please.
N x PCM56 in this case.
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Old 7th June 2005, 05:08 PM   #7
alchemy is offline alchemy  France
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N x pcm56, how many

give me your result, i make this for tda1545
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