Anyone ever used a progressive off-on-on standby switch

[topbrent]

Working on a limited space build and would like to use a off-on-on style standby-main switch.

Carling 2GG51-73
http://www.carlingtech.com/pdf/s_g.pdf

It is sold at AES as: PH520 for $5.25 ($3.75 for CEDist dealers)
http://www.tubesandmore.com/scripts/fox ... tem=P-H520

Anyone have experience or tips wiring this type of switch up?

David Allen and BillM also advertise these for sale for more $$$.
BillM uses these as the standby-on switch on his Blues-Jr mod kits.

[Bob-I]

Yea, I've used 2 types. The one you posted from AES doesn't look right, it should have more poles unless I'm just not seeing it right.

My Peavey transplant has a switch that Stby-Off-Play which works fine but you have to remember the positons, it's not intutive. The other is my bass amp and it's like the one from AES, off-Stby-Play. I like them, saves room and works great.

[Deric]

I just got one of the switches from AES (like the one in the link). Works great. Down=off Middle=Standby Up=Play Very intuitive.

2 lugs on one side are for the mains. 2 lugs on the other for standby.

[mlp-mx6]

I've used one as well. It works fine.

Personally I prefer a DPST for mains switching, though.

[sliberty]

I have used them on a few amps. I got them from ALlen Amps the first time, but now I see that CE DIstribution carries them as well. They work great, and save you some front (or back) panel real estate.

[David Root]

I've used a few of them. Very good switch. Less than $6 is a good price I paid more for mine.

I have had no issues with them. One amp I have it in runs 520V on the first B+ node feeding a pair of 8417s.

[selloutrr]

sundown uses the standby-off-on switch design. It works but i can't help but feel a little uncomfortable everything i flip it... i guess i'm not 100% sure its safe for the tubes. I wouldn't worry as much if the tubes weren't NOS.

[David Root]

My 8417s are NOS of course, no-one makes those any more. No problems.

[selloutrr]

ok i guess i will stop being worried I returned the SD1000H to stock running 5 tungram 12ax7 and two 70's of GE / Tung sol 6550's. The sound stage is amazingly dynamic and the highs are smooth. the clean ch. has glassy highs and full body lows. with the distortion ch. breaks up easily and just crisp enough to give note definition with out the sizzle.


Is there any concern for tube stripping during the flip between standby and on?

[plook]

I found what i was after, maybe i should have looked closer above.

http://uk.mouser.com/Search/ProductDeta ... 91-2GG5173

Mouser Part No. 691-2GG5173

This is the one, OFF - ON(circuit 1) - ON (circuit 2)

[eddie25]

ok i guess i will stop being worried I returned the SD1000H to stock running 5 tungram 12ax7 and two 70's of GE / Tung sol 6550's. The sound stage is amazingly dynamic and the highs are smooth. the clean ch. has glassy highs and full body lows. with the distortion ch. breaks up easily and just crisp enough to give note definition with out the sizzle.


Is there any concern for tube stripping during the flip between standby and on?

I can't imagine it would be much different than just using two separate SPST switches. I use a 100K 3 watt resistor across the standby section, which makes me feel safer though.

[Weathered]

My old Trinity Triwatt had that type of switch - I really liked it. It was intuitive, and saved space on the front panel. And the picture from AES looks right - as mentioned, one side is the 120V, the other is the B+.

[Milkmansound]

I use these in my guitar amps. They're perfect for adding a standby switch to tweed amps as well.

[plook]

I use these in my guitar amps. They're perfect for adding a standby switch to tweed amps as well.

Are they easy to wire up?

[Milkmansound]

Very easy. They are kind of big, but they easily fit into the rear of a Princeton reverb.

They are clearly labeled circuit 1 and circuit 2, but it's always best to check with a meter just in case.

You can see the outside of one here:

http://milkmansound.com/Milkman_Sound/Photos.html#8