Fender amplifier.. burnt choke ??

[rainerm_au]

I have a 1974 fender pa100 valve amplifier that I just killed (nasty smell and loads of smoke) . Now... I think I blew up the choke as its the only thing that looks burnt (TR2 on Schematic https://schematicheavencom.secure.powweb.com/fenderamps/pa100.pdf)
Now can someoneone tell me what this component acutally does in the circuit and what would cause it to go in such a fashion?
Any advice would be appreciated. I'm new to valve amps
Thanks

 

[audiousername]

The choke acts like an electrical flywheel, resisting a change in current (even if it means developing a voltage on its own). It's there to smooth the supply rail for the input/driver stages. It is surprising for them to blow - I've never destroyed one, myself. Hammond may have a suitable off the shelf replacement. The local distributor is Evatco (located in Victoria).

 

[martinab2]

Don't know this amp well, but from the schematic you posted I would be starting to look for a faulty output tube first. The choke supplies the screen grids of the 6L6s and I can't see anything else on that side of the choke which is likely to pull enough current to melt it.
Thats assuming of course that there are no shorts etc. the other possibility might be a duff smoothing capacitor however if that was the case, i would have expected the cap to explode first

I note that you are new to valve amps in which case I would recommend that you get someone who knows what they are doing (and has access to a variac) to sort this one out. Its a potentially difficult and dangerous job involving high voltages and high currents - death is a very real possibility if you get it wrong !