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Ultimate Twin TDA1541a Non-oversampling DAC with tube buffer & reclock set.......

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#341
Hi Thomas,

The DAC is still sounding very good.
Have you had a chance to send me the TCXO and pulse transformer?
I have tweaked this DAC to the max. The only missing thing is the re-clock circuit. I even have the two re-clock PCBs ready with a socket for the TCXO. If you only have the TCXO on hand, please send it to me. I'll get the transformer later.
Please let me know.
Thanks,
Julien
 
#347
Hi,
Let me step by step to answer the questions.

Hi Victor Heynchuk.

pls emailto me your contact telphone asap.

Your parcel was holding in the custom dept.

All the EMS parcel to Canada pls send me the contact tele no otherwase will return.

.thx

thomas



Ver.3 still had some problem to solve. t wil cheaper than ver.1& 2.

Previous buy will collect one set of the PCB free od chage But need to pay postge. since ver.3 is use EC900 for tube output stage( still not confirm) because regarding need to test the transformers.

Pls see the photo show was the testing Superalloy preamp output transformers.
5K:600 for 417 & 6c45 use.

if finally I choose EC900( Ultron SQ series from western-Germany). I had many on stock. standard kit prepare follow with kits. Pre-amp Output trans was use oriential Hi-B 0.3 M6 core.Furukawa magnetic wire to make.

All the pre-amp OUT trans was hand made according the spec I get it from japan. But adj regarding the core material was different. U can see the bobbin also hand made.

thx

thomas
 

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#350
tube-lover said:
Hi,
Let me step by step to answer the questions.

Hi Victor Heynchuk.

pls emailto me your contact telphone asap.

Your parcel was holding in the custom dept.

All the EMS parcel to Canada pls send me the contact tele no otherwase will return.

.thx

thomas



Ver.3 still had some problem to solve. t wil cheaper than ver.1& 2.

Previous buy will collect one set of the PCB free od chage But need to pay postge. since ver.3 is use EC900 for tube output stage( still not confirm) because regarding need to test the transformers.

Pls see the photo show was the testing Superalloy preamp output transformers.
5K:600 for 417 & 6c45 use.

if finally I choose EC900( Ultron SQ series from western-Germany). I had many on stock. standard kit prepare follow with kits. Pre-amp Output trans was use oriential Hi-B 0.3 M6 core.Furukawa magnetic wire to make.

All the pre-amp OUT trans was hand made according the spec I get it from japan. But adj regarding the core material was different. U can see the bobbin also hand made.

thx

thomas
Click to expand...


Thomas did you get my phone number?

Anthony
 
#353
Tube output stage resistor values

Anyone working on or has built the tube output stage board rev.1.0, what are the values of the following resistors?

R23, R4 and R37

I am finally working on this kit but the BOM seems to have some mistakes. Can someone help?
 
#356
Hi lans,

zip file of the tube send to U already.

I need your help & resend to riotubes. I send many time but looks he still not received. I don't know why.

peter, your DAC was ver.1, In my mine I give U ver.2 already. why not funish the ver.2 tube buffer?

ver.1 I need to check & remind any parts was change valve already. pls wait a little bit of time.

thx

thomas

pS. Ver.3 PCb hand print funish already. will post the protype this several days.
 
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