WD/WAD PSU PHONO II Choke upgrade

[colin.hepburn]

Good to see the Hammond choke upgrade is liked
Here is how it happened

It was just a pure chance I fitted it when I was upgrading the PSU II to feed the CF Pre
So had I not fitted the wrong Zener Diode which gave me 100 volts instead of the required 200volts this lead me too recheck the HT across the WAD Choke and checking the DCR so all was fine with the choke
So fitted the correct Zener this time and all was good 210volts to CF Pre
I then checked the phono HT, which has always been a bit high so knowing the DCR of the WAD Choke the light came on, wait a minute I have a Hammond 157G Choke, which has a higher DCR so fitted it in place of the WAD choke phono HT drops a little
Well you know the outcome of this upgrade

[bob orbell]

Originally Posted by Richard

Guy runs his with 2 PSUs Bob

I take you mean Guy Pettigrew Richard, I hope he see's this and gives a comment. I am getting my chums PSU on monday now, so will have a listen for a day and make a judgement. BOB

[Richard]

Originally Posted by bob orbell

I take you mean Guy Pettigrew Richard, I hope he see's this and gives a comment. I am getting my chums PSU on monday now, so will have a listen for a day and make a judgement. BOB

Yep, that's the feller Bob, hi Guy if you're still visiting

[Dik Dolan]

You guys just cost me £20.

Just ordered a 157G from Bluebell Audio, excellent chap and service.

Thanks for the info gents....even if you are bad for my wallet=)

[Desmodromic]

Originally Posted by Dik Dolan

You guys just cost me £20.

Just ordered a 157G from Bluebell Audio, excellent chap and service.

Thanks for the info gents....even if you are bad for my wallet=)

Honestly it's £20 well spent - and such an easy modification. I've just spent hours carefully replacing caps, resistors and wiring in my Kecl82 in order to get a real upgrade in the sound. You'll only have to solder two wires

[colin.hepburn]

Originally Posted by Dik Dolan

You guys just cost me £20.

Just ordered a 157G from Bluebell Audio, excellent chap and service.

Thanks for the info gents....even if you are bad for my wallet=)

Hi Dik
Yes 4 Pints and a pack o Crisps Worth
Pleas let us all know what you think of the Choke upgrade it be good to hear you views
Cheers
Colin

[pre65]

Cheap.

I've just ordered two chokes for my 833a amp and they weigh 9.5Kg each.

[Richard]

Originally Posted by colin.hepburn

Hi Dik
Yes 4 Pints and a pack o Crisps Worth
Pleas let us all know what you think of the Choke upgrade it be good to hear you views
Cheers
Colin

Crikey that's expensive beer...

[Greg.]

Originally Posted by Richard

Crikey that's expensive beer...

Ha ha, when did you last go to a quality pub?
Maybe beer is cheap in Nottingham because of the risk of getting shot on a night out

[colin.hepburn]

Originally Posted by Greg.

Ha ha, when did you last go to a quality pub?
Maybe beer is cheap in Nottingham because of the risk of getting shot on a night out

OK Then 5 Pints And £25 smackers for taxi home from town