Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on September 28, 2021, 05:32:29 pm

Title: Sluckey's Smoky whith paralleled pentode at input
Post by: kagliostro on September 28, 2021, 05:32:29 pm

Assuming you wont to reporpose Sluckey's Smoky L'il Toaster with 3 paralleled 5654/6AK5 tubes as input and drive with them a TMB ToneStack

which will be your way to parallel the input ?

(https://i.imgur.com/B93HRZh.jpg)

Many Thanks

Franco

Title: Re: Sluckey's Smoky whith paralleled pentode at input
Post by: tubenit on September 29, 2021, 07:03:42 am

Franco, 


On the Tweed Overdrive Special that DaGeezer and I worked on many years ago,  we both tried paralleling a 5879 & 5654 or 6AU6 in the first gain stage.


I had a 5879 9pin socket and a 7pin socket for the 5654 both available for a paralleled V1 type 1st gain stage.


I did play it that way for some time with both 5879 & 5654 paralleled but after some time I decided I liked the tone of one of those at a time more than them paralleled. I thought the 5654 sounded close to as good as the 5879, FWIW. 


Just offering my thoughts on that experiment. Bottom line is the paralleling added a little oomph but not enough good musical tone to make it worthwhile.


The

Title: Re: Sluckey's Smoky whith paralleled pentode at input
Post by: kagliostro on September 29, 2021, 09:05:30 am

Ciao Jeff

Thanks for the answer

my interest Is about to have enough signal to be able to drive without excessive loss the TMB ToneStack

I have a lot of those small little tubes and the idea Is to use 3 of them paralleled, so no other kind of tube in parallel for tone variations

Thanks again

Franco

Title: Re: Sluckey's Smoky whith paralleled pentode at input
Post by: tubenit on September 29, 2021, 11:27:26 am

This is pretty much how I did it with paralleled pentodes on the TOS.


With respect, Tubenit

Title: Re: Sluckey's Smoky whith paralleled pentode at input
Post by: kagliostro on September 29, 2021, 02:58:51 pm

Thanks again

So your choice will be a direct junction of the two pentodes without the use of mixing resistor

no mixing resistors = no signal drop, that is what I prefer

Franco