Wayne's BA 2018 linestage

[wdecho]

Russell, I had a touch too much hum on my build as well. This is with very efficient horn speakers and a cheap Ebay switcher. As I said in a previous post I just added some more capacitance after the switcher much as Nelson has done of some of his projects using a switcher and lowered my hum to an acceptable level. Why not give it a try first. Something in the neighborhood of 1500uf to 2200uf caps.

 

[labjr]

Russell, I had a touch too much hum on my build as well. This is with very efficient horn speakers and a cheap Ebay switcher. As I said in a previous post I just added some more capacitance after the switcher much as Nelson has done of some of his projects using a switcher and lowered my hum to an acceptable level. Why not give it a try first. Something in the neighborhood of 1500uf to 2200uf caps.

That doesn't look like a switcher?

 

[wdecho]

That doesn't look like a switcher?

Your correct, regulated PS. Two brain farts of late.

 

[Russellc]

Only one fatality in surgery, one of the 10 poof caps lost a leg. 6l6, gotta part number?
going through all my parts, none this small. found some 680 poofers, I'm pretty sure I have some 100 poof caps but cant find. I better look at amazon or ebay for small quantity. What Am I looking for, ceramic or what? 50 volt, 100 volt or ?

I could have these in 10 days:

Jameco Valuepro MD10-VP-R Monolithic Radial Ceramic Capacitor, 10 pF Capacitance, 50V, Epoxy Dipped Case (Pack of 40): Amazon.com: Gateway

Thanks,

Russellc

Whoops, that's 2 days. Ordered correct one from mouser along with some other items.

Russellc

 

[manniraj]

Hi Jim, sent you a PM yesterday for a set of boards.

thanks

@6L6

Hope you received my PM for a pair of these boards last week.

thanks

 

[6L6]

I've received many PM from interested people for the PCBs. I have not yet responded to anybody.

Again, if you are interested I'm currently forming a list;

I have the last batch of the purple PCBs that Wayne had made. There are about 50 stereo sets. I will send a set to anybody interested if you pay shipping.

If interested send me a PM with -

Forum Name

Real name

email

post address.


They will fit in a standard envelope so I suspect shipping won't be all that much.

 

[manniraj]

Thanks Jim, will wait for your reply to my PM then

 

[wdecho]

Russell, what kind of transformer are you using?

 

[wdecho]

6L6, Jim, Do you have a BOM on the parts you used in your kit for the users of just the boards? I have a friend that has contacted you on some boards asking me for a BOM and I would like to use the same parts you used in the kits you sold earlier.

 

[brianco]

.....if so perhaps you can put an attachment in this forum? Many thanks for your already sterling work across the DIYaudio building scene. I am sure that many would not have ventured into diy without your guidance.

 

[Russellc]

Russell, what kind of transformer are you using?

The Antek 6L6 suggested a few posts back.

Russellc

 

[Russellc]

6L6, Jim, Do you have a BOM on the parts you used in your kit for the users of just the boards? I have a friend that has contacted you on some boards asking me for a BOM and I would like to use the same parts you used in the kits you sold earlier.

Would like to see this also...

Russellc

 

[takitaj]

Just some input for others... Mouser carries a board edge mount similar to those mentioned earlier. The part number is 761-30468-N. You can use them either on the corners or on the edges.


Link: 30468-N RAF Electronic Hardware | Mouser


TJ

 

[labjr]

If there was a shared project on Mouser or Digikey, it would be even better.

 

[wdecho]

The Antek 6L6 suggested a few posts back.

Russellc

Even Nelson has said there is a lot of variances in Toroid's. Have you tried placing the toroid far away, outside the case, and see if you still have the hum? There is a member on this forum who had a bad hum on a M2 build. He spent a lot of time and money before moving the transformer outside the case. It was the toroid causing the hum.

 

[Russellc]

Even Nelson has said there is a lot of variances in Toroid's. Have you tried placing the toroid far away, outside the case, and see if you still have the hum? There is a member on this forum who had a bad hum on a M2 build. He spent a lot of time and money before moving the transformer outside the case. It was the toroid causing the hum.

I actually had it dead quiet. Then did the cap swap 6l6 noted. Killed a cap, should have replacements any day. Must have had a bad solder joint which surprised me....generally very careful, but there you have it! I mean there was no hum, stone dead quiet.

Russellc

 

[adason]

I apologize if this has been asked before, but I have not seen anything.
Has anybody compared the sound of Wayne's BA 2018 linestage directly against BA3FA linestage?

 

[6L6]

Yes. I like the Wayne better, but I’ll be hard pressed to say why. But I do

Also remember it’s not really an apples to apples comparison, the BA3 has much more gain

 

[MEPER]

Do you think audible noise can be reduced by using this kind of resistors in pre-amps?
http://www.vishaypg.com/docs/63140/var.pdf
I never see them in any pre-amp projects but they are made for the purpose?

 

[gary s]

I would hate to think what they cost, have you looked at that and where you can buy them?

To answer my own question - $15.23 USD each at Mouser!!