need help with 5f2a build

[alange5]

Hello all. First post here.

I'm looking for some help with a recent 5f2a build. I have not yet powered it up, but I thought I'd check in here before I did. FYI I have previously built a 5f1 and an 18 watt clone and I'm familiar with how to safely drain the filter caps before tweaking.

I'm using a Weber PT and a Hammond 125ESE OT.

My questions:

1.) I'm a bit confused as to what to do with the OT primaries. The original Fender layout I'm using shows only one lead connected to pin 3 of the 6V6. The more modern Weber layout, however, shows the second lead connected to the positive side of the first 16uf filter cap. I connected the brown wire to the 16uf cap and the blue lead to pin 3 of the 6V6. Is this correct??

2.) My PT does not have a tap for the heaters. I attempted to do the artificial center tap method, but I want to make sure I did it right. My 6.3v green pair runs from the PT to the terminals of the lamp holder (one wire to each terminal). Also attached to the lamp terminals are two 100-ohm resistors going to ground. FYI I grounded these resistors at the same spot that I grounded the negative end of the filter caps. The green pair then extends from the pilot lamp terminals to the heaters. Did I set this up properly?

3.) Another area of concern is the grounding. I am not too familiar with proper star grounding methods, aside from the general concept of keeping the preamp and power section grounds separate. In my build, I ran the ground from the 25uf cap to the brass plate near the guitar inputs. I have the artificial center tap, filter taps, and power cord grounded at one lug of the PT, and I have the red/yellow PT wire and .05uf "death cap" grounded at another lug of the PT. Any suggestions to improve grounding?

4.) Last but not least, the speaker jack wiring. I have the yellow OT secondary and the lead from the 22k resistor both connected to one side of the jack, and the black OT wire connected to the ground side.


A lot to swallow, I know, but any help anyone could provide would be much appreciated.


Thanks!

PHOTOS: amp build - a set on Flickr

[loudthud]

1) That should be correct.
2) That should work.
3) You grounding is ok if you followed the Weber layout. If you have used a three wire line cord, you should remove the 'Death Cap'. If you want to "improve grounding", you'll probably need to start over. Wait and see how much hum the amp has.
4) If the amp oscillates, you will have to reverse the two wires going to the jack. If the amp sounds funny, bad or squeals, disconnect the 22K to see if that fixes it.