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Tube-I-zator Professional PCB

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#65
Hi Oliver, I am building this for the new buffalo dac, do you know what the Ri/v should be for this DAC? On the Lampizator page, he mentions that output resistor for ESS DAC was set to 39R, is that the same as the Ri/v? Or is it the Rin resistor he also mentions?

Thanks.
 
#72
toufu said:
Hi Oliver, I noticed you are using Wago Terminals for this and the Lightspeed board, how do you insert the wire into the terminal? Do you need to buy the Wago tool to get it working?

By the way, here is a cheap source for the terminals:

socket receptacle connectors wago 236 4 pin,wd3,3a 10 p - eBay (item 380174438358 end time Apr-02-10 19:46:32 PDT)
Click to expand...

Hi toufu,

with the wago tool it is much easier but you could also use a small screwdriver.

Therefor you must push inside the back hole of the terminal to lift the internal contact.

Best regards,
Oliver
 
#73
Thanks for all the help, Oliver! I got my board working with the buffalo 2 DAC. Sounds great, very liquid, clear and nice 3D soundstage.

One thing though, I couldn't get it to work with 6922 tubes, just the 12AX7, but even with the 12AX7 I had to make sure the switch is open. Not sure why, can you comment on that?

An externally hosted image should be here but it was not working when we last tested it.
 
#74
toufu said:
Thanks for all the help, Oliver! I got my board working with the buffalo 2 DAC. Sounds great, very liquid, clear and nice 3D soundstage.

One thing though, I couldn't get it to work with 6922 tubes, just the 12AX7, but even with the 12AX7 I had to make sure the switch is open. Not sure why, can you comment on that?

An externally hosted image should be here but it was not working when we last tested it.
Click to expand...

Hi toufu,

sure i can 🙂
The silkscreen legend is designed for a switch.
On the 12AX7 position the contacts for the heaterswitch are open and on the 6N2P position closed!

So with the 6922 the contacts must be opened.

Witch problems do you have with the 6922?

:cheers:
Oliver
 
#76
Hi Oliver, I don't have any switches of that size, so I got 12AX7 to work by not having any jumper across the three pins. Is that correct? I couldn't get it to work with 12AX7 by having a jumper across the two pins that says '12AX7'.

By the way, can I get 12AT7 or 12AU7's to work without changing the Rk resistor? It's set to 200R right now.
 
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