[1MOR]

This is what I used, but in the 8 inch length size. 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270583727179&ru=http%3A%2F%2Fshop.ebay.com%3A80%2F%3F_from%3DR40%26_trksid%3Dp4712.m570.l1313%26_nkw%3D270583727179%26_sacat%3DSee-All-Categories%26_fvi%3D1&_rdc=1

[wushuliu]

Another nice option.  I will put the size and seller for these in the BOM but no links because they are finite. I will also add pactec and parmetal.

[wushuliu]

Also if someone wants to foot the bill and there is interest I will order a dcb1 board and do a tutorial on that and on The condition that there is a tour before payer gets it.

[daniloreyes]

PM

[mightym]

I'm getting ready to finally construct my B-1. ( Pass board, and matched transistors )

The info posted here is proving to be invaluable to someone who hasn't driven a soldering iron in over 20 yrs.

What are the thoughts concerning the substitution of the DPDT sw, for the input selection, with a rotary switch to give the possibility of additional inputs?

Any Idea where I would go about sourcing such a switch?  Would a double pole rotary work, or would it require an additional pole for the signal ground?  What is "Shorting" vs "Nonshorting" when I look at the # and variety of rotary's available at someplace like Mouser, my eyes glaze over and I want to take a nap....

Opinions, answers, or suggestions are welcome...

John

[rtate]

hey avionic, what are those by-pass caps and what values did you use??

[Nick77]

hey avionic, what are those by-pass caps and what values did you use??

Also how much difference in the cap swap to Sonicaps, i opted for 1uf Sonicaps and for the 10uf went with Daytons 1% precision. I hope i am not disappointed but the 10uf Sonicap was pricey. 

[Nick77]

My 10 uf caps are MIA, just for the record NEVER opt for the Smartpost at Parts Express. It takes forever, i went for the low price ship since it was only 2 caps but i have been waiting a whole week and still not here

I went with a wood case since i had a little walnut veneer left over, PRP resistors and Takman resistors for the output.

[wushuliu]

Oh bummer, yeah smartpost sucks. I've got 10uf Erse and the Russion K73-16. lmk if you want me to drop some in the mail...

[avionic]

hey avionic, what are those by-pass caps and what values did you use??

Vitamin Q's and I believe they are .022 These were NOS (new old stock)that a guy on ebay had.

[wushuliu]

Also how much difference in the cap swap to Sonicaps, i opted for 1uf Sonicaps and for the 10uf went with Daytons 1% precision. I hope i am not disappointed but the 10uf Sonicap was pricey. 

The general feedback on Sonicaps have been the Gen I can sound on the lean/bright side - hence the Gen II as a warmer bypass. So those with the Daytons may make for a more analytical delivery...

[avionic]

Also how much difference in the cap swap to Sonicaps, i opted for 1uf Sonicaps and for the 10uf went with Daytons 1% precision. I hope i am not disappointed but the 10uf Sonicap was pricey. 

  This is actually another complete b1 with the sonicaps. The other one has the dayton 1% caps and for the $ in this application I think the daytons would be hard to beat. Try bypassing the dayton 1% with the dayton film/foil caps if you want to experiment later.

[wushuliu]

I'm getting ready to finally construct my B-1. ( Pass board, and matched transistors )

The info posted here is proving to be invaluable to someone who hasn't driven a soldering iron in over 20 yrs.

What are the thoughts concerning the substitution of the DPDT sw, for the input selection, with a rotary switch to give the possibility of additional inputs?

Any Idea where I would go about sourcing such a switch?  Would a double pole rotary work, or would it require an additional pole for the signal ground?  What is "Shorting" vs "Nonshorting" when I look at the # and variety of rotary's available at someplace like Mouser, my eyes glaze over and I want to take a nap....

Opinions, answers, or suggestions are welcome...

John

A 2 pole should work fine. As for sourcing, it depends on how many inputs you are looking to use. I like high quality selectors like Grayhill... you can do a search on digikey for Grayhill rotary switches...

[avionic]

The general feedback on Sonicaps have been the Gen I can sound on the lean/bright side - hence the Gen II as a warmer bypass. So those with the Daytons may make for a more analytical delivery...

  Exactly right. Adding the vitamin Q's really helped soften things up a little. I also added riken resistors for the 1k values.

[Nick77]

  This is actually another complete b1 with the sonicaps. The other one has the dayton 1% caps and for the $ in this application I think the daytons would be hard to beat. Try bypassing the dayton 1% with the dayton film/foil caps if you want to experiment later.

Thanks for the input, i have some small value russian pio's i might try as bypass's

[wushuliu]

  Exactly right. Adding the vitamin Q's really helped soften things up a little. I also added riken resistors for the 1k values.

Yes, I like Vit Qs. Had them in my speakers.

Good resistors like riken, prp, shinkoh, etc. I think are a must for the B1.

[mightym]

A 2 pole should work fine. As for sourcing, it depends on how many inputs you are looking to use. I like high quality selectors like Grayhill... you can do a search on digikey for Grayhill rotary switches...

Thank you

[Nick77]

Its ALIVE! Wushuliu you hatched another one, many thanks for your support. 

Right out of the box it sounds really good, already getting very good bass and clean sound. Cant wait to put a few hours on it. 

[wushuliu]

Its ALIVE! Wushuliu you hatched another one, many thanks for your support. 

Right out of the box it sounds really good, already getting very good bass and clean sound. Cant wait to put a few hours on it. 

Excellent!  Now where are the pics ! 

[roymail]

Would these PNP 1K resistors be a good choice? 

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PNP100JR-52-1R-ND