which reverb?!

[makepeace]

hi again. unfortunately what you suggested didn't work so well Chuck. basically what it gave me was zero signal on the one side and about 80-20 dry on the other. very strange.. must have had something to do with the loading of the pot and its taper. anyway, i put in a 500k dwell control before the two 12BH7 grid resistors and that helped a lot in terms of being able to get plain dry when turned all the way to one side. i think i'll replace the mix pot with a 1meg, and also the dwell pot. also going to put in a gain control before the dwell control where the dry signal is taken with a resistor to get unity at the lowest setting eventually also going to put that tone control in. and switched caps at the recovery stage for a low cut.

p.s. removed the 4.7M resistor. didn't seem to be doing anything.

regards

[Chuck H]

unfortunately what you suggested didn't work so well Chuck. basically what it gave me was zero signal on the one side and about 80-20 dry on the other. very strange.. must have had something to do with the loading of the pot and its taper.

Hmmmm... That's not possible if it's wired correctly.

Oh well. As long as you've got it working satisfactorily for you.

Happy turkey (in the US) Enjoy shameful amounts of pie (no matter where you are).

[makepeace]

thanks you too. here in South Africa we eat turkey at Christmas.

hmmm.. i'm almost certain i wired it exactly as you laid out in the schematic. i will however try again.

regards

[Chuck H]

If you look at the diagram you'll see that pot loading, impedance and taper aside, the control will only allow full dry or full wet at either end of the adjustment. all other maters aside.

We're celebrating Thanksgiving in the US tomorrow. It's a celebration of two cultures coming together and enjoying the available foods near a sparse winter season. Turkey and pumpkin pie are the tradition. The world can always use any excuse for more pie so I highly endorse it for any willing participants.

[makepeace]

k lets see if i have this right..

when the pot is set at 0 ohms on the dry side, you have:

-dry signal going to ground
-small portion of wet signal through 500k pot resistance to ground
-large portion of wet signal through 220k resistor to output

and vice versa on with 0ohms on the wet side.

so ultimately you'll getting your dry/wet signal grounded and an attenuated version of your wet/dry out. right?

will try solder the resistor in again and give it another listen.

yep and black friday thereafter have heard lots about it. its being used as a trendy comparison here when talking about our "black tuesday" affair regarding the protection of information bill that has just been forwarded by our parliament.

enjoy!

[makepeace]

but yeah anyway as i say, i can get a dry enough signal for my tastes by turning the mix and dwell all the way down, 1 megs will be even better.

anybody have any advice on the best bet for reducing the overall gain of this setup? at the moment its driving the poo out of my input stage if i go past 2! would like the option to have more gain though if i wanted, and i'm happy with the amount of verb i'm getting at the moment, so don't want to fiddle with the actual gain of the stages.

so what i propose: take the line out from the mix pot to the wiper of a 500k pot, with the other lug connected to ground (via an ???ohms resistor) and output signal coming from the other. the ???ohms resistor will be determined by whatever gets me to unity with the input signal.



would this suffice?

[makepeace]

ok, i did what i suggested above, and it worked 100% (to my ears). got the ground resistor down up to 500k, and as far as i can tell without a frequency trace, we have unity. does anybody have any better suggestions though if you think this isn't the best answer? i mean of course it sounds fine to me, but who am i?

next question (and hopefully the last). the reverb trail/decay is rather long.. is there a way to make this variable without buying another spring tank? also, are there any other controls i can put on it?

have a good turkey.
regards