Advice on bell like chime when switching to standby- BE100

[Beandust]

Just put 4 mullards in the pre slots with a balanced one in v4. I get a bell like chime when i use any of the voicing switches and when i switch to stand by on the dirty channel.Was not there before with the stock pre amp tubes..any advice would be greatly appreciated..tnx amp sounds good. a little more open and top end is strong. i think that is ok,but i want to be sure i am not risking anything

 

[LP Freak]

Sounds like a micro phonic tube

 

[Beandust]

Sounds like a micro phonic tube

What I was thinking..kind of strange for it do it when going to standby.I have gotten an occasional pop" when doing this before changing these pre amp tubes. Never any ringing..will see if I can weed out the bad one.hopefully it's only 1, they are brand new..

 

[LP Freak]

Sounds like a micro phonic tube

What I was thinking..kind of strange for it do it when going to standby.I have gotten an occasional pop" when doing this before changing these pre amp tubes. Never any ringing..will see if I can weed out the bad one.hopefully it's only 1, they are brand new..

New or not it happens.

 

[Beandust]

Sounds like a micro phonic tube

What I was thinking..kind of strange for it do it when going to standby.I have gotten an occasional pop" when doing this before changing these pre amp tubes. Never any ringing..will see if I can weed out the bad one.hopefully it's only 1, they are brand new..

New or not it happens.

Yes I understand,just was wondering if it was bad for the amp..sounds good a lititle noisy but punchy. Thank you for the response..it's greatly appreciated

 

[LanierP]

Try the pencil tap test on each preamp tube with the amp on.

 

[Beandust]

Try the pencil tap test on each preamp tube with the amp on.

Will do,thanks..looks like microphonic were shipped to me..now what...return

 

[LP Freak]

Try the pencil tap test on each preamp tube with the amp on.

Will do,thanks..looks like microphonic were shipped to me..now what...return

Swap positions with another first and see if the problem goes away

 

[Beandust]

Try the pencil tap test on each preamp tube with the amp on.

Will do,thanks..looks like microphonic were shipped to me..now what...return

Swap positions with another first and see if the problem goes away

That's a good way to weed out the bad or to see if it's one or more, I am curious is it the tubes or is the amp sensitive to certain 12ax7s, I should have just put the exact same tubes I had being the ruby's and the Chinese not that that's a guarantee. Never had any problems like this swapping out pre amp tubes. I tried a tad 12 ax7 in v1 of my small box and it sang like a champion,put a sovtek in v2 and no bell pops..I believe I will send them back and get the ruby's

 

[LP Freak]

Try the pencil tap test on each preamp tube with the amp on.

Will do,thanks..looks like microphonic were shipped to me..now what...return

Swap positions with another first and see if the problem goes away

That's a good way to weed out the bad or to see if it's one or more, I am curious is it the tubes or is the amp sensitive to certain 12ax7s, I should have just put the exact same tubes I had being the ruby's and the Chinese not that that's a guarantee. Never had any problems like this swapping out pre amp tubes. I tried a tad 12 ax7 in v1 of my small box and it sang like a champion,put a sovtek in v2 and no bell pops..I believe I will send them back and get the ruby's

It's not necessarily a particular brand it's more per tube. You could get a ruby with the same exact problem

 

[Beandust]

Try the pencil tap test on each preamp tube with the amp on.

Will do,thanks..looks like microphonic were shipped to me..now what...return

Swap positions with another first and see if the problem goes away

That's a good way to weed out the bad or to see if it's one or more, I am curious is it the tubes or is the amp sensitive to certain 12ax7s, I should have just put the exact same tubes I had being the ruby's and the Chinese not that that's a guarantee. Never had any problems like this swapping out pre amp tubes. I tried a tad 12 ax7 in v1 of my small box and it sang like a champion,put a sovtek in v2 and no bell pops..I believe I will send them back and get the ruby's

It's not necessarily a particular brand it's more per tube. You could get a ruby with the same exact problem

So I swapped v1 back to the original and the light ringing diminished, swapped v2 and it is gone.However I do get pops" when using the toggle's and from time to time switching from on to standby. Is that some kind of dc build up? Is it possible to get rid of it? If it would change anything about the sound then ill deal with it. The amp is epic

 

[RACKSYSTEMS]

No that's normal nothing to worry about

 

[Beandust]

No that's normal nothing to worry about

Thanks you sir. I greatly appreciate the information.best amp period