1176 -> More Gain?

thedug · Nov 20, 2004

So I was trying to dig up the threads on getting more gain from the 1176.

I accidently posting to the "black market" so I am moving the thread here.

Scenaria pointed me toward the 3 methods, I am just curious which method folks are recomending. Or if there are any others.

http://www.groupdiy.com/index.php?topic=3512

Bo Hansen · Nov 20, 2004

Hi thedug,

It can be done in the output amp feedback chain, but there are some different circuits around the years, so which serial number have you on this particular 1176, and how much gain do you need ??

--Bo

thedug · Nov 20, 2004

It is the gyraf diy dealio.

I believe that is Rev F.

The gain is just a little weaker than I remember an 1176.

d./

dukasound · Nov 20, 2004

Hi
In our forum now we have two project (truth it is Jacobs) 1176. One with out transformer wired in 1:2 ratio second with 2:1.
Any comparative tests????
Duka

Bo Hansen · Nov 21, 2004

thedug,

Ok, you have a Gyraf 1176, as Scenaria say in the older posting, it is the R33 you shall play with if you whant to change the gain, so try to change the 11k R33 resitor to 10k, 8,2. 5,6k, 4,7k ......... and check if you can find the gain you want.

--Bo

thedug · Nov 21, 2004

I thought that could cause problems and since I don't have a scope I didn't want to run the risk.

d./

Bo Hansen · Nov 21, 2004

thedug,

If it is only some dB`s I think it is without any risk.

What do you use for output transformer, is it a 1:1 or 1:2 ???

--Bo

Scenaria · Nov 21, 2004

doug!

you really need to save up and get a cheapie scope!!

I mean you can get a decent one for $20-$40 on ebay...

thedug · Nov 22, 2004

I think the transformer is actually 2:1. It is setup as a step down. Right?

Steve: I actually have a scope, but I need to learn how to use it.

1176 -> More Gain?

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