Volume loss after PT & Choke change

[aniki]

Hi There,
Just throwing this out here in case anyone has any wisdom they can share.
About three months ago I fitted a Mercury Magnetics output transformer to my Marshall DSL50.
To say I was impressed with the upgrade would be an understatement.
So I then decided to go the whole nine yards and get the Power Tranny and choke as well.
Straight after fitting these two items, the tone is simply incredible.
However, I feel as though I have definitely lost some volume.
Its like the amp is now running at 25 or 30 watts and reaches its limit too early.
-
I have measured the voltage at pin 3 of the power tube sockets and get a solid 483v on each socket.
Ive also biased down to 35ma.
Admittedly, prior to the PT and Choke change I did have the bias set too high so I am going to try with a new set of tubes but in the mean time I'm asking if anyone can suggest any other reason why this issue may have occurred.
Many Thanks

[MWJB]

What was the plate voltage at pin 3 with the old PT? I very much doubt the choke is having significant influence regarding this issue.

[aniki]

Hiya,
Thanks so much for replying.
Annoyingly I didnt take a measurement with the old PT. It was the original dagnall and two of the spade terminals snapped of the windings virtually as soon as I touched them. They were held on with a sliver of metal about 3mm wide and after years of heat transfer the metal had become so weak it was like butter! Not a good design IMO.
Nice to know you dont think its the choke.
To be honest at low to moderate volume, the tone and response is just fantastic.
I really cant see myself changing this amp for anything as long as I can sort this issue out.
Just to ellaborate, before the PT & Choke swap if I had the master at about 4 to 4.5 it felt like the speakers would explode with anymore power. IE-Plenty!
Now I get up to 5 on the volume and it feels like theres nowhere left to go, like the tubes have run out of steam or as if Iam just running at 25 or 30 watts.

[MWJB]

Connect a true RMS AC volmeter accross the OT secondaries, play, determine an average voltage, then divide by speaker load in ohms. What do you get?

Then set for cleanest tone & repeat.

If the new PT as given you a drop in B+ the amp might be making a little less power, you might just need to revise your pot settings. Forget the numbers, set them by ear, not by looking at them & see if you can still dial in the headroom you need.

[aniki]

Forget the numbers, set them by ear, not by looking at them & see if you can still dial in the headroom you need.

Best advice ever!
Thanks so much.
I dismantled the whole amp again today just to double check everything was seated and soldered properly.
I resoldered the choke connections as I wasnt totally happy with them first time round. Think I was a bit scared of damaging the board!
Anyways, all back together and biased at 28mV.
Went to rehearsal just with my amp and a custom 2x12.
I was starting to drown out the drummer with the volume just at 3!
No loss of tone, or oomph! Just pure awesomeness