Xmas Amp - Dibya's TDA7293 by Jhofland

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#304
Available boards

If there are any boards available, I would like 2
thank you.






ahtllc / 2 boards / USA *Paid Twice!!* Etsy order 1868983988 & Etsy order 1914458647 (as PM'd on Etsy)
Flamethrower1 /2 boards/ USA *Paid*
Signal Lost / 2 boards / USA *Paid*
diy.tiger / 2 boards / NZ *Paid* (plus 2x All Cee's PCBs and 2x RTR SSR Speaker Protection Gen2 (Etsy order #1904430160)
MShipmanPE/ 2 boards / USA *Paid*
Angchuck / 2 boards / Singapore *Paid*
Francois G / 2 boards / USA *Paid*
Asuslover /2 boards /USA *Paid*
astromo / 2 boards / Australia *Paid*
Kay Pirinha / 2 boards / Germany *Paid*
Sixto / 2 boards / USA *Paid*
Tubesguy / 2 boards / USA *Paid*
Hicoco / 2 boards / France *Paid*
Kokanee / 2 boards / Canada *Paid*
chermann/ 2 boards / Austria *Paid*
twocents/ 2 boards / USA *Paid*
s610adam / 2 boards / USA *Paid*
Jlevro / 2 boards / USA *Paid*
nautibuoy / 2 boards / UK *Paid* (plus 2 * All Cees PCBs and 2 * RTR SSR Speaker Protection Gen2 (Etsy order 1908473317) - all paid)
invaderzim / 2 boards / USA *Paid*
kp93300/ 2 boards/ Malaysia *Paid*
comicrcc / 2 boards / USA *Paid*
Legis31 / 2 boards / USA *Paid*
Pandpliers/ 2 boards/ USA *moved from waiting list*
DarpMalone / 2 Boards / Canada *moved from waiting list*

Waiting List:
turion64 / 2 boards / USA
MaxReboBand / 2 boards / USA *moved from main list for no payment*
hochopeper/ 2 boards / Australia *moved from main list for no payment*
Raymond Simmons/ 2 boards
 
#308
I'm glad that the USPS seems to be working in a timely manner again and that you guys are receiving your boards.

Hi Ray Simmons, the boards are all spoken for at this point. Turion64 just got moved from the waiting list up because we had one more person not respond for payment call. If either he or DarpMalone do not pay, you will be next.

ahtllc / 2 boards / USA *Paid Twice!!* Etsy order 1868983988 & Etsy order 1914458647 (as PM'd on Etsy)
Flamethrower1 /2 boards/ USA *Paid*
Signal Lost / 2 boards / USA *Paid*
diy.tiger / 2 boards / NZ *Paid* (plus 2x All Cee's PCBs and 2x RTR SSR Speaker Protection Gen2 (Etsy order #1904430160)
MShipmanPE/ 2 boards / USA *Paid*
Angchuck / 2 boards / Singapore *Paid*
Francois G / 2 boards / USA *Paid*
Asuslover /2 boards /USA *Paid*
astromo / 2 boards / Australia *Paid*
Kay Pirinha / 2 boards / Germany *Paid*
Sixto / 2 boards / USA *Paid*
Tubesguy / 2 boards / USA *Paid*
Hicoco / 2 boards / France *Paid*
Kokanee / 2 boards / Canada *Paid*
chermann/ 2 boards / Austria *Paid*
twocents/ 2 boards / USA *Paid*
s610adam / 2 boards / USA *Paid*
Jlevro / 2 boards / USA *Paid*
nautibuoy / 2 boards / UK *Paid* (plus 2 * All Cees PCBs and 2 * RTR SSR Speaker Protection Gen2 (Etsy order 1908473317) - all paid)
invaderzim / 2 boards / USA *Paid*
kp93300/ 2 boards/ Malaysia *Paid*
comicrcc / 2 boards / USA *Paid*
Legis31 / 2 boards / USA *Paid*
Pandpliers/ 2 boards/ USA *Paid*
DarpMalone / 2 Boards / Canada *Need payment*
turion64 / 2 boards / USA *moved from waiting list*

Waiting List:
Raymond Simmons/ 2 boards / USA
MaxReboBand / 2 boards / USA *moved from main list*
hochopeper/ 2 boards / Australia *moved from main list*
Click to expand...
 
#311
xrk971 said:
I'm glad that the USPS seems to be working in a timely manner again and that you guys are receiving your boards.

Hi Ray Simmons, the boards are all spoken for at this point. Turion64 just got moved from the waiting list up because we had one more person not respond for payment call. If either he or DarpMalone do not pay, you will be next.
Click to expand...

Sent payment
 
#313
ClaudeG said:
Hi Pete/Turion,

I shall be very interested to read how that one compares with your Aiyima, when the time is right and should you feel so... don't hesitate to PM or post your findings.

Have a nice project

Claude
Click to expand...

Thank you Claude! I actually don’t own a Aiyama amp. I have been playing with Lester’s V1 tpa3255 amp and 3eAudio’s V2 tpa3255 as of late. I own a Dr Mordor’s 3255 as well and it is just a wonderful sounding amp as is although I may swap out the opamp to a 1656 (once I can actually get one again!). The Xmas amp’s competition will be mainly against my main amp, a MyRef Fremen Evo A LM3886-based amp. Chipamps are simpler beasts to build an amp around IMHO.

Yes, I plan to vary the build components a bit on the Xmas amp but I’ll be following everyone’s else’s build experiences with excitement. Building & playing with a new DIY project is always fun.

Cheers, Pete
 
#315
Many thanks Pete 🙂

Well, I don't have a Xmas amp... but I find it an intersting project. Perhaps one day...

Once you are done, I would be delighted to read your findings regarding this Xmas amp vs DrMordor's Class D, be it with or even without OPA1656. Of course also interested in th eresult vs the Fremen 3886...

Looking forward to it

Have fun building it together

Claude
 
#320
Hi,

I had a quick look at the schematics and was wondering about the input impedance of this little power amp as proposed. I thought it could be usefull to know it so people could deal with it sides preamp etc.

It seems it could be lower than 20k, or am I mistaken? Perhaps in the 16k region?

Should this be correct, is there a reason for having chosen the entry caps C1 and C2, or C101 and C102 being as low as 1uF on the schematic (or even .68uF in BOM)? I understand there might be other considerations such as sonic balance, not overstressing the amp, interaction with DC servo, or even people not running this amp on full range LS...

Of course I might be completely wrong with the input impedance value, in which case please don't hesistate to correct me LOL!

Last but not least, is there a reason for having chosen MKS or C0G in signal path as entry caps, instead of say affordable small PPP caps à la 940C?

Just thinking out loud and sorry for my intrusion!

Many thanks for your help

Claude
 
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