Help...lost my clean channel.

[stokedpoke]

First of all, thanks to anyone who has any input on this. I'm currently using a standard 2x12 Lonestar and I'm pretty sure my rectifier tube went. I've had this happen before and it's a pretty tale-tell sign when you lose the 10 watt setting and 50 watt with reverb on the "tube-rectifier" setting. Not a big deal, I ordered a new rect tube from Eurotubes and should be here in a few days. But yesterday, I was playing on the 50 watt setting (Reverb set to silcon diode), switched to my gain channel,worked fine, changed back to my clean channel and nothing. Tried my gain channel again, no problems, but nothing out of the clean. Anybody have any ideas? Preamp tube (which one)?

 

[tle4]

I would say the first preamp tube V1 would be the clean channel.