[alwayshungry]

Congrats on finishing up your B22 FallenAngel. When I first saw it at CanJam, I thought KRMathis' B22 somehow made it to LA. Also thanks for hooking it up for me to give a listen. My faceplates will be here tomorrow so hopefully I will have a post in this thread soon.

 

[FallenAngel]

Bulgin only makes 3A latching switches, I went with 693-1241.6824.1124. You can easily go with amb's power switch driver, but I prefer a mechanical switch to a relay for power (don't ask why

).

 

[Nebby]

Quote:

Originally Posted by alwayshungry /img/forum/go_quote.gif ...When I first saw it at CanJam, I thought KRMathis' B22 somehow made it to LA.

You sure weren't the only one

 

[MrMajestic2]

Quote:

Originally Posted by FallenAngel /img/forum/go_quote.gif It's been almost a year in the planning, making and configuring this monster, but it is finally complete. May I present my Balanced Beta22 (aka a tribute to Jena cables). The PSU is a dual Sigma22 running off a pair of 225VA Plitron transformers. As I'm a cable lover, all of the wiring is Jena (with minimal exceptions in PSU where toroid wiring is used, plus a short length of solid-core Cardas for the power switch). Special thanks to: AMB for making the krmathis panels public so I had a fantastic starting point Justin of HeadAmp for offering an awesome deal on the balanced DACT Michael of Jena Labs for putting up my constant requests for different wires in random lenghts. I won't get too much into how it sounds, so I'll just say it's fantastic with my Jena cabled HD650 and drives my Omega Grande 6R single-driver speakers amazingly.

Awesome build FA

 

[cfcubed]

Quote:

Originally Posted by Forte /img/forum/go_quote.gif Looks impressive, what amp is that?

It's a Magnavox console amp rebuild that got out of hand. One of my 1st builds since getting back into DIY/electronics. Sounds pretty nice tho & is ready for another 50 years of play

 

[oneplustwo]

FA - How many amps will your amp draw? I was thinking about using the 3A bulgin latching switch and figured 3A would be fine as I'm just using it with 2 50VA toroids.

Anyway, great build! Maybe when I get mine done we can have a little Beta-off since we're so close to each other! My panels won't be as fancy nor will I have the fancy wires, but I do have a joshua tree attenuator!

 

[krmathis]

Quote:

Originally Posted by Nebby /img/forum/go_quote.gif You sure weren't the only one

Even I jumped a little bit when I saw the picture(s) from CanJam. Although I did knew better...
Great work indeed!

 

[dbfreak]

Wow! Another half dozen pages of awsome builds. Love the B22 and those tube amps!

 

[linuxworks]

Quote:

Originally Posted by FallenAngel /img/forum/go_quote.gif Bulgin only makes 3A latching switches, I went with 693-1241.6824.1124. You can easily go with amb's power switch driver, but I prefer a mechanical switch to a relay for power (don't ask why ).

why?

I recently started playing with 'solid state relays' of the dc-control ac-switch kind. (thing of things: its a tech that is used inside espresso machines in DIY 'pid' upgrades!).

one thing I learned about them is that they do zero cross detection and so when you ask the little epoxy box to switch the 'contacts', it waits until the ac wave crosses zero. this also puts slightly less spikes on the ac power 'bus'.

seems like win/win to me.

I don't think they wear out, they have low closure resistance and are noiseless.

 

[rille2]

Switching a trafo at 0V is AFAIK not the best. This produces the highest switch on current.

 

[El_Doug]

Quote:

Originally Posted by linuxworks /img/forum/go_quote.gif why? I don't think they wear out, they have low closure resistance and are noiseless.

Why would you want a noiseless relay!? I rather prefer my tiny little bulgin seemingly creating a gargantuan clicking noise

 

[FallenAngel]

Quote:

Originally Posted by oneplustwo /img/forum/go_quote.gif FA - How many amps will your amp draw? I was thinking about using the 3A bulgin latching switch and figured 3A would be fine as I'm just using it with 2 50VA toroids.

Speaker duty as well, might go up above 3A, maybe 4A

Quote:

Originally Posted by linuxworks /img/forum/go_quote.gif why?

I'm old-school, I like physical switches.

 

[amb]

Quote:

Originally Posted by oneplustwo /img/forum/go_quote.gif FA - How many amps will your amp draw? I was thinking about using the 3A bulgin latching switch and figured 3A would be fine as I'm just using it with 2 50VA toroids.

While the steady-state draw of the β22 from AC mains might be much less than 3A, the turn-on surge current (from the toroid as well as the reservoir caps charging up) can be much more than that. Using an inadequately rated switch will cause its contacts to wear out prematurely.

 

[linuxworks]

fyi, I connected a kill-o-watt meter to my 2ch b22 and it varies from 30watts (nothing playing) to about 36w while filling the room with sound. that's one 60va avel toroid, one s22 PS and 2 B22 boards.

I was surprised, it was 'only' 30 watts or so. I thought it would be a lot more than that.

 

[DoYouRight]

I tried to modify the text on the AMB plate files and it wouldnt let me type in new words. how do I do this?