cathode based El34 amp=awesome. a couple of comments and ?s

[imo]

I inherited a few chassis in the last few months. One of them was a Hammond 51C. After researching for a bit i decided to build an EL34 cathode based amp, largely following the path of the Matchless Clubman 35(on of my fave amps of all time!). I used both the PT(plenty), OT(good), and choke(enough current, but could use more inductance) and have a really phenomenal sounding amp. I decided to try and implement a reverb circuit on it as well and tried the "one tube reverb", following a circuit i saw posted by 'Tubenit' on this forum using a single 12ax7. It sounds great, but i am planning on using this for some serious roadwork and want to make sure i'm maximising the reverb. (I have already signed off on the rest of the circuit)..I had a couple of questions i would love to volley out there.

-I have 5 power nodes with the amp before inserting the reverb.Right now i am running the reverb off of an additional node. I tapped it from an 8.2k resistor, which now goes to another 20k(10u cap). Both the reverb transformer and a 100k are powered by this. The reverb transformer is getting around 405v in, the 100k around 365. That puts around 400v on pin1 of and 250 on pin 6.
Can i calculate tube output impedance into the transformer like a plate load? I am getting around 19k with my calculations, which matchess well with the transformer.
Am i maximizing this circuit as is? I am around 1.1mA on the driver. The receiver is a classic 100k/1.5k(22u) combo. I
I'd like to wrap this up and take it on the road but would love some input from those with more building experience than myself
Thanks
Ian

[xtian]

To borrow a phrase from TGP, "This thread is worthless with pictures!"

(Sorry, I can't answer your question...but I love looking at amp guts.)

[imo]

it will take me a little bit to post pics. Here is the shchematic for starters.
Pictures will tell you a little, but its point to point(most of it) so hard to see a ton from it

[10thTx]

Look at the drawing of "Reverb Tweaks" here:

http://www.el34world.com/Forum/index.php?topic=7957.0

If you are not getting enough reverb, try a 2.2M reverb pot and lose the 500p cap going to ground (or try a 250p or different value).

This "one tube reverb" is more subtle then a Fender reverb and it emphasizes more mids, IMO.

With respect, 10thtx

[imo]

Thanks for the "tweaks" schematic. I actually have that, and have looked at it. I am pretty happy with the reverb as is, i was hoping to understand the circuit a little better, and figured this, being a new topology would be a good way to get my feet wet! I think my rambling text about the amp may have obscured a couple of questions.
-would i be better off lowering the voltage further? Right now it is 400 going into the transformer and 365 going into the 100k
-can you calculate plate impedance on the 12ax7 using the transformer specs for your "plate load? The transformer is 25000:8.
-are my calculations correct for a 17,000rA with a 1.2k resistor(10u cap) going into the 25k transformer?

pics coming up