It is currently Tue Mar 17, 2020 2:30 am

All times are UTC - 7 hours



Post new topic Reply to topic  [ 29 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next
Author Message
Post subject: S-S 22 Reverb Issue..
Posted: Tue May 08, 2012 11:36 am
Offline
Hobbyist
Hobbyist
User avatar

Joined: Tue May 08, 2012 7:34 am
Posts: 2
Hi everyone,

I'm having an issue with my Super-Sonic 22.

Turning the reverb up past 3 or 4 produces a hum at around the 350hz range, it starts out at a low volume and gradually builds. (to a point)

I've tried re-seating tubes, new power cord, different outlets(bypassing my power-conditioner/surge protector)

(Tubes are stock about 5months old, it's a practice amp that never leaves the house and has not gotten all that much use.)

I've read posts of people having issues with the reverb on the S-S's but it always seems to be described as a buzz or hiss. Besides the reverb problem I have not had any other noise issues, it's fairly quiet when no signal is being pushed.

Thanks for reading...


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: S-S 22 Reverb Issue..
Posted: Tue May 08, 2012 7:16 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
Hi kbrooks,

Sounds like a microphonic reverb tube, likely V3 (12AT7) or next suspect V4 (12AX7). :idea:

You could temporarily swap the tube in V3 with the one in V5 as both are supposed to be 12AT7, to see if the problem changes. Sometimes, moving a microphonic tube to a lass sensitive position will allow it's continued use.

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Wed May 09, 2012 9:20 am
Offline
Hobbyist
Hobbyist
User avatar

Joined: Tue May 08, 2012 7:34 am
Posts: 2
Thanks shimmilou,

I'll try that as soon as I get home.


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Thu May 10, 2012 10:45 am
Offline
Amateur
Amateur
User avatar

Joined: Sun Aug 14, 2011 10:30 am
Posts: 174
I have that problem with my SS-112 and I tried all kinds of tubes in there. I finally gave up and figured that was part of the amp. My Deluxe Reverb 65RI and Silver Face tube reverb are dead quiet. I even tried the original SF tubes in the SS-112 and had the same problem - I even used the SF tank with the SS-112 and still had the same problem


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Tue May 15, 2012 6:29 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Wed Aug 15, 2007 6:46 pm
Posts: 575
Location: Indy
The reverb circuit is hosed up in the SS22. Look at the schematic for the SS100 and you will see the attempt to fix it. Some that post on here have taken their SS22 to a service center and got back a quieter amp. Not sure what the fix is, as it appears to be a Fender secret.

_________________
The design of each element should be thought out in order to be easy to make and easy to repair.
Leo Fender


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Wed May 23, 2012 1:11 pm
Offline
Professional Musician
Professional Musician
User avatar

Joined: Sun Feb 15, 2009 3:52 pm
Posts: 2005
Other than the Reverb issue, which I hope you get fixed to your satisfaction...how do you like the amp?

I just saw a youtube on this amp and was really impressed by the variety of tone you could get out of it. Sounded like a DRRI on steroids. :lol:

_________________
-T

"You can't spend what you ain't got, you can't lose what you ain't never had" ~ McKinley Morganfield


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Wed May 23, 2012 7:03 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Wed Aug 15, 2007 6:46 pm
Posts: 575
Location: Indy
tyronne wrote:
Other than the Reverb issue, which I hope you get fixed to your satisfaction...how do you like the amp?

I just saw a youtube on this amp and was really impressed by the variety of tone you could get out of it. Sounded like a DRRI on steroids. :lol:


Love it! Very versatile, and great tone. Lead channel can go into sonic destruction mode with single coils. Clean channel sounds great too, typical Fender tone.

_________________
The design of each element should be thought out in order to be easy to make and easy to repair.
Leo Fender


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 3:34 pm
Offline
Professional Musician
Professional Musician

Joined: Wed May 25, 2011 12:45 pm
Posts: 1169
I'm not a circuit designer by trade but I can read a schematic and the reverb tank in the combo 22 has a couple of caps connected across the in and out. C100, connected to the reverb output, appears to loop back to the reverb input through C99. Never seen capacitance across the in and out of a reverb tank before. They're tiny caps so they may not even affect audio signals.

This is not a recommendation, however, if C100 were disconnected from the circuit it would disconnect that capacitance loop. If that is the source of the noise then the problem would be solved.

Again, to be very clear, I am only guessing! I'm not a qualified tech. I'm just speculating. Don't yank that cap based on my speculation.

My best recommendation would be to take your amp to a tech or if it's under warranty take it to the dealer to get it fixed.

Cheers,

_________________
In my opinion Leo Fender had essentially perfected the guitar amplifier by 1964.


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 4:02 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Wed Aug 15, 2007 6:46 pm
Posts: 575
Location: Indy
mhowell wrote:
I'm not a circuit designer by trade but I can read a schematic and the reverb tank in the combo 22 has a couple of caps connected across the in and out. C100, connected to the reverb output, appears to loop back to the reverb input through C99. Never seen capacitance across the in and out of a reverb tank before. They're tiny caps so they may not even affect audio signals.

This is not a recommendation, however, if C100 were disconnected from the circuit it would disconnect that capacitance loop. If that is the source of the noise then the problem would be solved.

Again, to be very clear, I am only guessing! I'm not a qualified tech. I'm just speculating. Don't yank that cap based on my speculation.

My best recommendation would be to take your amp to a tech or if it's under warranty take it to the dealer to get it fixed.

Cheers,


Look at the SS100 and you'll see the fixes. The most important to me would be the shielded cable from reverb out. I have quieted my amp down by rerouting this. I may go with some shielded cable, then if the noise level is still bad, attack the circuitry. The circuit probably needs less gain.

_________________
The design of each element should be thought out in order to be easy to make and easy to repair.
Leo Fender


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 4:39 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
Can you explain what you think you see as different in the reverb circuit between the 22 and 100?

The only difference that I see is that the 100 uses both halves of the tube for reverb recovery, and the 22 uses half of a tube for reverb recovery. Other than that the circuits are virtually identical. The drawing style is a little different in looks, but electrically the circuits are the same. :idea:

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 4:50 pm
Offline
Professional Musician
Professional Musician
User avatar

Joined: Sun Feb 15, 2009 3:52 pm
Posts: 2005
So have you tried swapping tubes as Shimmilou suggested?

And you're sure it's not 60 cycle hum you are hearing?

_________________
-T

"You can't spend what you ain't got, you can't lose what you ain't never had" ~ McKinley Morganfield


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 6:46 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Wed Aug 15, 2007 6:46 pm
Posts: 575
Location: Indy
tyronne wrote:
So have you tried swapping tubes as Shimmilou suggested?

And you're sure it's not 60 cycle hum you are hearing?


please. i'm a little more advanced than that. tube change happened when i got the amp. several swaps since.

_________________
The design of each element should be thought out in order to be easy to make and easy to repair.
Leo Fender


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 6:48 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Wed Aug 15, 2007 6:46 pm
Posts: 575
Location: Indy
shimmilou wrote:
Can you explain what you think you see as different in the reverb circuit between the 22 and 100?

The only difference that I see is that the 100 uses both halves of the tube for reverb recovery, and the 22 uses half of a tube for reverb recovery. Other than that the circuits are virtually identical. The drawing style is a little different in looks, but electrically the circuits are the same. :idea:


shielded cable. and the bias of the recovery tube is different.

_________________
The design of each element should be thought out in order to be easy to make and easy to repair.
Leo Fender


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 6:58 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
I noted the recovery tube difference. That piece of shielded cable is what you call "hosed up"?

Tyronne's response had to be for the OP, as I suggested that to him. Sounded like you "unhosed" your amp already. :?:

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: S-S 22 Reverb Issue..
Posted: Mon May 28, 2012 7:31 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Wed Aug 15, 2007 6:46 pm
Posts: 575
Location: Indy
shimmilou wrote:
I noted the recovery tube difference. That piece of shielded cable is what you call "hosed up"?

Tyronne's response had to be for the OP, as I suggested that to him. Sounded like you "unhosed" your amp already. :?:


So let's hear your opinion on why it's noisy shimm. Just because its the same on the schematic doesn't mean its the same on the amp. It is the same relative to the schematic and I'm capable of determining that, just like you are. But, how you run the wires and what kind of wires is important. You can create all kinds of ground loops, and the schematic will still be the same. It's Fenders new amp, and the reverb circuit is hosed.

_________________
The design of each element should be thought out in order to be easy to make and easy to repair.
Leo Fender


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 29 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: