Amp has no mid control and other questions....

atomheartmother

Senior Member
Messages
594
First of all, my amp has no mid control. Does that mean there is a set amount of mids?

Also the reverb/vibrato channel sounds weird so I don't use that channel and only use the normal channel. However, I'd like to have reverb. Is there someway to get reverb in the normal channel? Someone once told me you could run an instrument cable from one of the two inputs in the reverb channel over to the second input of the normal channel to tap in the effects to the normal channel? Is this possible or will something blow up?

Finally, what is the difference between the two inputs for each channel?

Thanks.

Here's a pic of the amp.

 
Messages
429
There's not really a "set " amount of mids they just are what they are depending on how the tone stack is voiced.
The reverb can be added to the normal channel but it will be the same reverb so if it sounds "weird" on the reverb channel I'm guessing it will on the normal channel too.In what way is it "weird"?
I'm not familiar with your particular amp but in general the difference between the channels is the reverb and tremelo.
The tone stack may also be voiced different.
 

atomheartmother

Senior Member
Messages
594
The tone in the first channel sounds wierd. It's bright and shrill. I took it to a tech to fix twice (other things as well) and he didn't seem to do anything about the first channel. It doesn't matter though.

How would I got about getting reverb in the normal channel? It doesn't matter if I turn the reverb all the way up; there is still no reverb.

Each channel has two inputs (Input 1 and Input 2...actually I don't think they're labeled). What's the differene between the two inputs of each channel?
 

GregR

Member
Messages
18
i think that inputs 1 are normal and inputs 2 are bright. have you checked what happens when you move the preamp tubes around? it's possible one is half-gone, so the reverb is mucked up.
 
Messages
429
Unless you told the tech to put reverb on the normal channel there will be none.I'm still unclear as to what is "weird" about the reverb.
You may want to try a different tech or try and be more clear in your explanation of what you want done to the amp.
The difference between the inputs is that one is attenuated more than the other.It has added resistance.
 

atomheartmother

Senior Member
Messages
594
Originally posted by tonezoneonline
Unless you told the tech to put reverb on the normal channel there will be none.I'm still unclear as to what is "weird" about the reverb.
You may want to try a different tech or try and be more clear in your explanation of what you want done to the amp.
The difference between the inputs is that one is attenuated more than the other.It has added resistance.

Nothing is wrong with the reverb. The reverb/vibrato channel just sounds bright, tinny, and harsh.


What does attenuated mean?
 

Wakarusa

Member
Messages
1,459
Originally posted by atomheartmother
Nothing is wrong with the reverb. The reverb/vibrato channel just sounds bright, tinny, and harsh.


What does attenuated mean?
Attenuated means reduced. Generally the #2 input is either 3dB or 6dB down (quieter) from the #1 input.

Bright, tinny, and harsh may be nasty tubes in that channel. Worst case, though, is that the design of the reverb (and/or trem) circuit is what makes it bright, tinny, and harsh -- so adding the reverb to the normal channel may just make it sound nasty too.

Anybody have a schematic for this beast? Maybe pics of the insides? There's always the chance that the reverb channel has a bright cap on the volume pot which could also be behind the unpleasant sounds.
 

atomheartmother

Senior Member
Messages
594
Here are some pics of the circuit. I have bigger versions, but I had to make them small enough for the site to host them.











 

Wakarusa

Member
Messages
1,459
Originally posted by atomheartmother
Here are some pics of the circuit. I have bigger versions, but I had to make them small enough for the site to host them.
Can't quite see enough detail. What would work best are two hi resolution pictures -- one looking straight down on the circuit board and tube sockets, the other looking straight at the back of the front panel controls. You can e-mail 'em to me if that would help.
 




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