Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: bluesfuze1 on July 06, 2020, 11:06:20 am

Title: EC Tremolux output question
Post by: bluesfuze1 on July 06, 2020, 11:06:20 am

I have a questions about EC Tremolux...I understand there is a resistor something that is cutting gain I dont understand why they would do that as there is a low power switch. my question is can I just remove this resistor/component?

Title: Re: EC Tremolux output question
Post by: sluckey on July 06, 2020, 11:21:24 am

Show us the resistor on a schematic.

Title: Re: EC Tremolux output question
Post by: shooter on July 06, 2020, 11:23:16 am

Ha, you're shadowing me  :icon_biggrin:

here's Dougs list of tremolux's  there's 5-6 different ones all have Resistors, gotta narrow it down some to help

https://el34world.com/charts/Schematics/files/Fender/Fender_Schematics.htm

Title: Re: EC Tremolux output question
Post by: sluckey on July 06, 2020, 11:38:23 am

Here's a schematic thanks to tubeswell...

https://el34world.com/Forum/index.php?action=dlattach;topic=21535.0;attach=63550;image

Yes, you can remove that resistor.

Title: Re: EC Tremolux output question
Post by: bluesfuze1 on July 06, 2020, 11:43:24 am

Yes thank you so much Sluckey....so it was on another forum
Do you know why it was put there...just curious

Title: Re: EC Tremolux output question
Post by: sluckey on July 06, 2020, 11:52:39 am

The original 5E9A had two channels with two 1M volume pots. The EC only has one channel and one 1M volume pot. The resistor in question simulates the missing volume pot. Look at a 5E9A schematic to see this.

Title: Re: EC Tremolux output question
Post by: bluesfuze1 on July 06, 2020, 01:09:52 pm

So thats why gain is so much more when resister is removed.
Tone much better too
Great...much appreciated

Title: Re: EC Tremolux output question
Post by: sluckey on July 06, 2020, 01:13:32 pm

Do you actually have this amp? Can you post some pics of the innards?

Title: Re: EC Tremolux output question
Post by: bluesfuze1 on July 06, 2020, 01:35:27 pm

Yes I do
I only took one of resistor in question

Title: Re: EC Tremolux output question
Post by: PRR on July 06, 2020, 06:28:16 pm

That class of volume control does not even work "right" without a load like that resistor.

But it "works" either way. Suit yourself.

Title: Re: EC Tremolux output question
Post by: bluesfuze1 on July 06, 2020, 07:13:58 pm

define "right" to my ears amp sounds thin and then just flubby at higher volumes with that resistor
Without it amp sings and at higher volumes breaks up nicely

Title: Re: EC Tremolux output question
Post by: tubeswell on July 06, 2020, 07:18:20 pm

Quote from: sluckey on July 06, 2020, 01:13:32 pm

Do you actually have this amp? Can you post some pics of the innards?

Title: Re: EC Tremolux output question
Post by: tubeswell on July 06, 2020, 07:20:47 pm

More pics

Title: Re: EC Tremolux output question
Post by: tubeswell on July 06, 2020, 07:24:05 pm

Yet more pics

Title: Re: EC Tremolux output question
Post by: bluesfuze1 on July 06, 2020, 07:45:19 pm

thanks tubeswell for these pics may I download them for future use?

Title: Re: EC Tremolux output question
Post by: tubeswell on July 06, 2020, 10:36:32 pm

Quote from: bluesfuze1 on July 06, 2020, 07:45:19 pm

thanks tubeswell for these pics may I download them for future use?

help yourself

Title: Re: EC Tremolux output question
Post by: shooter on July 07, 2020, 08:37:32 am

 :laugh:
I have that speaker in my main cab paired with an Eminence