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124 transformers

Hello, I’m struggling to find a mains transformer for the 124 build that matches the voltage specs given in the layout and schematic. I’ve a link (https://www.hotroxuk.com/mains-transformer-for-fender-tweed-twin-amp-5f8-5e8) to this one which is the closest available I’ve sourced.

Can anyone kindly advise if this is suitable or point me in the right direction.

I think I’ve found the output and choke but advice will be welcomed on sourcing them also just to ease one’s mind.

Thanks

6 answers0 replies

6 Comments

Ronald Westland

Jan 18

Hi Andrea, You emntion InMadout as supplier of transformers. If I visit the website (https://www.inmadout.com/) I cannot find any of the product numbers you mention: PTM38503V-BK (€102), TU3240-26, (€88) and a 5H choke (€19).

Is this the correct website? Thanks, Ron

wdra65

Apr 19, 2023

Masterelectronics.com,

Unknown member

Jul 22, 2023

Replying to

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Andrea Antonello

Feb 05, 2023

Hello Adam!

I normally get mine custom made from Italy. Company is called inMadOut and the owner, Savino Luce, is a nice guy and very helpful. Most of the amps I've built used his transformers, the quality is excellent. For my latest 102 clone, I got a PTM38503V-BK (€102), TU3240-26, (€88) and a 5H choke (€19).

Only thing, you might have to check shipping rates depending on where you live... that's normally what kills the mood with transformers :D

Adam Bradley

Feb 05, 2023

Replying to

Thanks for the reply Andrea, it may just be me being somewhat blind, but I can’t seem to fathom how you order from them. I've found the webpage but appear stumped thereafter. I’ve googled to no avail.

Also whilst I’m on the subject of parts, I can get some but not all of the sprague caps, would values of relatively close match affect the tone a great deal? In reality I’m talking 0.0047 in place of 0.005 etc. Unless again, you’d recommend a supplier that has exacting parts relative to your BOM.

Sorry to ask so much, it’s my first tube build and I’m usually buying stock components readily available everywhere, or using the stuff I’ve already got.

Speaking of which I’ve got a small collection passed down to me of mullard oc35 germanium transistors, amongst other NOS stuff. I can send some your way if you’ve a use of them

Andrea Antonello

Feb 05, 2023

Replying to

Hello Adam,

no problem. Feel free to ask any questions you have - that's exactly why I created this forum :) and there are a lot of people - even more knowledgeable than me - willing to help! :)

As far as inMadOut, I'd suggest you write directly to the owner, Mr. Savino Luce: info@inmadout.com

For values, you are correct, a 0.005 would be equivalent to a 0.0047, also because all those caps are anyway produced with a tolerance of ±10% or ±20%, which is already above the 0.005-0.0047 difference. Same goes for some other common caps values, such as 20uFvs22uF, 0.002vs0.0022, etc.