| Kasino "Club" U-100-P [message #10365] |
Thu, 29 January 2009 12:02  |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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OK, A couple months ago, I ran onto a deal ($25) on this little jewel. It was working, sort of, but had a high amount of hum in it. I don't know where the guy was storing the thing, but it had about 8 lbs of dust on it. The reverb wasn't working either and I thought the two issues might be related. I checked to see if the reverb tank was actually plugged in inside the unit and it was. I did notice that the cardboard dust cover was collapsing and actually riding on the springs, so I took it off, fashioned another one and glued it on. I cleaned the unit up and set it back for a time when I could delve into it to see if I could figure out what was causing the hum.
Anyway, this morning, I took the chassis out of the unit and decided that the first thing I'd do was to put a grounded power cord on it. Lo and behold, when I got that completed, my hum issue had vanished. I checked all the knobs on all four channels and everything was working, except the reverb. I checked the input/output cables from the tank for continuity and everything appears to be fine there. I cleaned the contacts and plugged everything back up. Still no reverb.
So, now, for some of you guys with more experience with this stuff, what should I check now?
Thanks in advance for any help with this.
Rod
There's only two kinds of music. . . . blues and zippity doo dah.
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| Re: Kasino "Club" U-100-P [message #10366 is a reply to message #10365] |
Thu, 29 January 2009 12:24  |
chicagobill
Messages: 2005
Registered: April 2003
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Senior Member |
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Did you check the tank transducer coils with an ohmmeter?
If you have one, read the resistance across each of the RCA jacks on the tank. Both sides should read somewhere around 50 and 200 ohms. If either or both read wide open, then check for broken wires on the jacks or corroded connections.
If you don't have a meter, shake the springs, do you hear them through the speaker? Try switching the input and output cables to the tank and shake again, now do you hear anything?
If you don't find any broken wires or bad connections, you'll need to try and substitute in another tank to see if that will cure the problems.
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| Re: Kasino "Club" U-100-P [message #10367 is a reply to message #10365] |
Thu, 29 January 2009 12:36 |
stevem
Messages: 4756
Registered: June 2004
Location: NY
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Senior Member |
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If you have a ohm meter set it for ohms and unplug the reverb send and return cable from the board, hook your ohm meter across each rca plug and check for a reading. If they do not test open than the pan is ok, if not you will have peel off the cover from the pan and see if any of the small wires coming off of the female rca on the are broken off.
Sometimes this can be hard to see due to the bent over wire hold down arm.
If the wires are ok,than the small transducer is open and its time for a new pan.
If these checks confirm the pan being ok than its time to check the amp.
A quick check is to just turn up the reverb on the amp, and listen to hear any gain in hiss or hum as this would most likly confirm that the reverb recovery section of the amp is working.
To furthure confirm that this stage is working unplug both cables from the pan, and plug them back into the amp, turn the reverb down and touch the tip of each cable one at a time with your finger while you turn up the reverb. You should hear a buzz on one of the cables, if not than the recovery stage is dead, but you should still check the send stage.
To do this you will need a cable that goes from a male rca to 1/4" male, this will let you put the send signal into another amp, or if you have a long enough male rca to rca cable you can test it thru your stereo.
Do not worry if you do not know which cable is the send, you will not harm anything by plugging a output to output, but note if the everything is good and the pan is plugged in the wrong way you will not get any reverb.
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| Re: Kasino "Club" U-100-P [message #10368 is a reply to message #10365] |
Thu, 29 January 2009 13:01 |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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I just looked in the literature section at the Kasino brochures. They have the Club model listed as being 100 watts. I thought the U100 was a low end version of he K-100's, making it just a 50 watt unit. And what impedence cabinet should I use this thing through? The K-100's required a minimum 8 ohm, if I remember right.
Anyway, thanks in advance again for the help.
Rod
There's only two kinds of music. . . . blues and zippity doo dah.
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| Re: Kasino "Club" U-100-P [message #10369 is a reply to message #10367] |
Thu, 29 January 2009 13:06 |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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Thanks steve. If it slows down here at the office, I'll see if I can run a few of those tests to see what I'm dealing with.
I'll let you know.
Rod
There's only two kinds of music. . . . blues and zippity doo dah.
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| Re: Kasino "Club" U-100-P [message #10370 is a reply to message #10368] |
Thu, 29 January 2009 14:10 |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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Steve:
> If you have a ohm meter set it for ohms and unplug the reverb send and
> return cable from the board, hook your ohm meter across each rca plug
> and check for a reading. If they do not test open than the pan is ok, if not
> you will have peel off the cover from the pan and see if any of the small
> wires coming off of the female rca on the are broken off.
Bill:
> If you have one, read the resistance across each of the RCA jacks on the
> tank. Both sides should read somewhere around 50 and 200 ohms. If
> either or both read wide open, then check for broken wires on the jacks
> or corroded connections.
Both wires check to be working. 175 ohms on one side, 165 ohms on the other. Shaking the springs does nothing.
Steve:
> If these checks confirm the pan being ok than its time to check the amp.
> A quick check is to just turn up the reverb on the amp, and listen to hear
> any gain in hiss or hum as this would most likly confirm that the reverb
> recovery section of the amp is working.
I hooked the reverb pan back up, turned the amp on and adjusted the volume so I could even hear some hiss through the speakers. Amazing what putting that grounded plug did for the hiss. Anyway, once I could hear it, I cranked the reverb on each of the 4 channels listening for a change in the sound from the speakers. No change.
Steve:
> To furthure confirm that this stage is working unplug both cables from the
> pan, and plug them back into the amp, turn the reverb down and touch the
> tip of each cable one at a time with your finger while you turn up the reverb.
> You should hear a buzz on one of the cables, if not than the recovery stage
> is dead, but you should still check the send stage.
OK, touching the tip of the cables produced no buzz. The sound from the speakers did not change. Yes, I unplugged at the reverb tank and left the cable plugged into the PC board.
Steve:
> To do this you will need a cable that goes from a male rca to 1/4" male, this will
> let you put the send signal into another amp, or if you have a long enough male
> rca to rca cable you can test it thru your stereo.
OK, I did this one. I got some hum through the 2nd amp when I made the connection on one side. no hum on the other side, of course. I know which side is output now.
Steve:
> Do not worry if you do not know which cable is the send, you will not harm anything
> by plugging a output to output, but note if the everything is good and the pan is
> plugged in the wrong way you will not get any reverb.
OK, I have not tried switching the cables from the tank. They could be plugged into the PC board backwards. I presume from what you just said that if they are plugged in backwards, it won't cause any damage, but the reverb will not function. Is that correct?
Rod
There's only two kinds of music. . . . blues and zippity doo dah.
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| Re: Kasino "Club" U-100-P [message #10372 is a reply to message #10371] |
Thu, 29 January 2009 15:54 |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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I just reversed the two RCA cables. Cranked the reverb knobs to zero on all 4. I turned the amp on, slowly brought the reverb knob up. Nothing. No change whatsoever. I also shook the springs trying to get some output. Nothing.
So, based on this, are we looking at a problem on the circuit board?
This model amp isn't one of those that requires the footswitch being on to engage the reverb, is it? I don't have a footswitch, but I could easily fix a 1/4" plug to close the circuit.
Rod
There's only two kinds of music. . . . blues and zippity doo dah.
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| Re: Kasino "Club" U-100-P [message #10373 is a reply to message #10372] |
Thu, 29 January 2009 16:05 |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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OK, I just jumpered across the footswitch jack and poof, I had reverb. So I'll fix a jumper plug for the thing and be done with it.
Steve and Bill, Thank you so much for your rapid and accurate input.
Just for the record now, we know that the Kasino Club model PA head requires a completed circuit at the footswitch jack for the reverb to work.
Thanks again, guys.
Rod
There's only two kinds of music. . . . blues and zippity doo dah.
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| Re: Kasino "Club" U-100-P [message #10378 is a reply to message #10376] |
Fri, 30 January 2009 09:00 |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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I've already put it back together, but I'll tear it back down and get the number for you. You guys helped me immensely and if I can add to the collective bank of knowledge, I'll be glad to. I'll get to that this morning unless I get slammed with patients. I'll also post the serial number so les has it to add to his collection of knowledge.
Rod
There's only two kinds of music. . . . blues and zippity doo dah.
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| Re: Kasino "Club" U-100-P [message #10379 is a reply to message #10376] |
Fri, 30 January 2009 11:01 |
Optyk
Messages: 125
Registered: August 2006
Location: Texas
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Senior Member |
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Ok, steve, the only writing I saw on the board is on the bottom side and looks to me like it says:
KEI-1 1C803
or
KEI-1 4C803
Les:
On the official ID Tag for the amp, it says:
Model: U100-PA
Serial #: 11236
There's only two kinds of music. . . . blues and zippity doo dah.
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