[harryf]

I got a pair of cymbal's built.They will not turn on.I replaced the diode's in the instruction book with vishay-telefunkin sf 4007's rated at 1 a.The stock part is 1n4148.It's a scottkey dioed.The 4007's i have in it are hi performance fred's.Does anyone see a problem with this part swap?
I'm wondering if this might be the reason i'm getting no tube's lighting up.
Does the ground lift switch have to be installed?
I did reverse the diodes in my cornet 2 years ago.It also did not light up.Do the lines on the circut board corespond to the cathode?I installed the diode's with the cathodes on the stripes on the board it this right?.

[poty]

...a pair of cymbal's built... not turn on. I replaced the diodes ... Does anyone see a problem with this part swap?

No problems at all. The diodes are nothing to do with the heatings, they are only to light LED.

I'm wondering if this might be the reason i'm getting no tube's lighting up.

It might be the reason (when the new diodes are bad-shorten), but then I think you would have fuse blowing or smoke from the transformer.
The simplest way is to check the 6.3V from the green wires of the transformers. If it is OK, then there is something connected with wrong soldering or contacts.

Does the ground lift switch have to be installed?

No.

I did reverse the diodes in my cornet 2 years ago.It also did not light up.

The schema is rather different, but in the Cornet 2 there is no problem to change either. I think you did some mistake.

Do the lines on the circut board corespond to the cathode?

According to the solution, the cathodes go in the square holes.

[harryf]

Ok say the diode's are ok and instaled correctlly do i look at the transistors next.Like maybe i overheated one?Would that cause none of the tubes to light up?
I am going to check the green wire tonight.
I'm pretty sure everything is installed correctlly.Even the diode's.I checked the data sheet and they seem to be ok buti'm no expert.
There are two earth prong's on the board.I figured that was so they could be mirrored.I only hooked up one.Could this be a problem?

[poty]

Ok say the diode's are ok and instaled correctlly do i look at the transistors next.Like maybe i overheated one?Would that cause none of the tubes to light up?

No, just:

I am going to check the green wire tonight.

My guess - the main fuse, the transformer or a contact.

There are two earth prong's on the board.I figured that was so they could be mirrored.I only hooked up one.Could this be a problem?

I think - no. But you should be more precise about describing what do you mean.

[harryf]

I mean there are two earth spades on the board.One right side one left side.I figured it was for the ablity to make a left and right side amp.Mirroring the amp's it says in the instruction's.
I instead made them the exact same way.With the single 6 h30 on the right side top looking from above.
I checked the diode's they are installed correctly.
So i'm thinking it might be the transistor's.
Just to clarify it's not the led's not lighting up.It's the tube's.
I'm going to double check all the resistor's but i think it would still light up.
I'm also wondering if i wired the switch right.
I used a non stock switch because the stock on off switch was not in stock.
Im wondering if i might of wired the switch and plug wrong?
I used the exact same part's in my clarinet and wired it the same way but my cymbal is dead.My clarinet work's great.

No fuse blow's.So i'm thinking no power.I have miswired another hagerman product and it blew the fuse.I have to check the green wire.

[poty]

I mean there are two earth spades on the board.

I know... I think, the problem is somewhere else.

I checked the diode's they are installed correctly.

OK!

So i'm thinking it might be the transistor's.
I'm going to double check all the resistor's

You should check power voltage FIRST.

Just to clarify it's not the led's not lighting up.It's the tube's.

OK!

Im wondering if i might of wired the switch and plug wrong?

This is possible! I think you should check the wiring and the voltage on the first coil of the transformer. Use the schematic, not another device for reference, because even similar device may have slightly different wiring.

No fuse blow's.So i'm thinking no power.I have miswired another hagerman product and it blew the fuse.I have to check the green wire.

Do it now, before anything else. The tube heating is rather independant thing, so it should work even all other resistors,  transistors... soldered wronlgly.

[harryf]

Ok i pulled a green wire installed the 5a4d and got 3.32 v.It lit the tube.So is that ok?I noticed there are two green wire's.So this would be half the winding?
Why wouls pulling one of the green wire's cause it to work?I changed nothing else.
I had none of the 6h30's in.

[poty]

...I pulled a green wire, installed the 5a4d

You mean 5AR4?

... and got 3.32 v.
...I noticed there are two green wire's.So this would be half the winding?... So is that ok?

Yes, if you measure between the chassis and the wire. To be shure you should measure another halve.

It lit the tube. ...Why wouls pulling one of the green wire's cause it to work?I changed nothing else.
I had none of the 6h30's in.

I think something wrong with the heating circuits. I suggest to delete all the diodes (D1 and D2), insert 6H30 and look what happens. If the heating of the tubes will be visible - the problem is in the diodes. If not - the problem is in wiring/solders joints.

[harryf]

The oddest thing happened.Last week i tried both amp's no power.Last night i opened them up but i don't remember doing anything different.Maybe i switched something but i don't remember if i did but everything light's up now.Really odd!
So thank's for the help!I havent listened to them or biased them yet that's for another day but everything is looking good:)

[poty]

Congratulations!