Looked inside K200B2 [message #10269] |
Mon, 12 January 2009 22:43 ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
WVTom
Messages: 16 Registered: January 2009 Location: West Virginia
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First I want to thank Stevem for the welcome to the community. I appreciate the information provided right from the start. I'll try to be brief here and seek information from you guys and gals.
I removed the amp from the housing and discovered the following: It was full of dirt, cobwebs, dead spiders and other bugs. But I found that someone has been inside at some time in the past. Each of the input jacks designated LOW for the Bright and Normal Channels have toothpicks inserted between the metal clips keeping the innermost part from touching the outermost. I am in the dark as to why someone would do this. Maybe you guys can shed some insight on this for me. As for the rest of the interior, I cannot see any other modifications.
In addition to this, Stevem I have attempted to locate the same 4500mfd@50 volt rail filters on the net. I am having no such luck, so can you direct me to the appropriate web site. I am going to only use the amp for guitar and have no intentions of any other instruments running through it. Are there other things I should be looking at before replacing the above?
Also, I should note that I am not an electronic whiz, (just basics) but there is a electronics technician at work who I will call upon for the nitty gritty repairs. Would he need the schematics for this amp? If so, is there somewhere I could obtain these?
Thanks in advance for any and all assistance.
Tom
Kustom K200B-2 w/ 3 12's
Fender Vibro Champ (72) Given to my son
1970-72 Gibson SG w/ Bigsby per Ser. # Also given to my son
2005 Taylor T5 - C2 (Koa)
Alvarez AJ60
2010 Taylor 814ce Tobacco Burst
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Re: Looked inside K200B2 [message #10287 is a reply to message #10269] |
Fri, 16 January 2009 15:06 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
WVTom
Messages: 16 Registered: January 2009 Location: West Virginia
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Junior Member |
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Thanks Stevem for replying to my messages.
I have not been able to do anything with the amp yet due to High School Basketball games this week. One more tonight and then I am free till Monday night except for Church.
I am going to look at working on the jacks a little now before having to leave for the game. If you find some free time down the road, can you go ahead and give me the information on the 4500mfd 50 volt rail filters as to where to locate the original or the equivalent replacement ones.
Thanks and all have a good day and weekend.
Tom
Kustom K200B-2 w/ 3 12's
Fender Vibro Champ (72) Given to my son
1970-72 Gibson SG w/ Bigsby per Ser. # Also given to my son
2005 Taylor T5 - C2 (Koa)
Alvarez AJ60
2010 Taylor 814ce Tobacco Burst
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Re: Looked inside K200B2 [message #10299 is a reply to message #10292] |
Mon, 19 January 2009 15:19 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
WVTom
Messages: 16 Registered: January 2009 Location: West Virginia
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Junior Member |
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Steve
Thanks for the information on the part #. I have placed the order and now am just waiting for arrival around the end of the week. I'll let you know how things go.
I really appreciate the assistance you have given thus far. It is nice to know there is someone willing to take time out of their busy schedule and offer assistance to a total stranger.
Thanks again...
Tom
Kustom K200B-2 w/ 3 12's
Fender Vibro Champ (72) Given to my son
1970-72 Gibson SG w/ Bigsby per Ser. # Also given to my son
2005 Taylor T5 - C2 (Koa)
Alvarez AJ60
2010 Taylor 814ce Tobacco Burst
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Re: Looked inside K200B2 [message #10561 is a reply to message #10269] |
Sun, 01 March 2009 16:59 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
WVTom
Messages: 16 Registered: January 2009 Location: West Virginia
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Junior Member |
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Hey Steve,
I just wanted to say after so long since you provided the information to me that I have the amp up and running. I did not put the new filters in until a week and half ago. As I stated earlier, basketball with my daughter. A side note is that they won their Regional Final this week and now have one more test to see if they get into the State Tournaments.
Anyway, the amplifier has no more popping at shut down. Smooth as silk one could say. There is some hissing noise coming from one of my speakers. This happens to be a replacement Jensen in the cabinet that I put in a few years ago. The two other Jensen 12's (originals) only have a small amount of the hiss.
This thing sounds really great. Brings back some old memories and I forgot how loud these things could be. When I play it now, I only turn the volume about 1/4 to 3/8's of an inch and my Taylor T5 cranks through it. I've yet to find the time to run my old SG through it which is what I used in the early 70's, but hopefully that will not be far off.
Thanks again.....
Thanks once again for your help.
Tom
Kustom K200B-2 w/ 3 12's
Fender Vibro Champ (72) Given to my son
1970-72 Gibson SG w/ Bigsby per Ser. # Also given to my son
2005 Taylor T5 - C2 (Koa)
Alvarez AJ60
2010 Taylor 814ce Tobacco Burst
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Re: Looked inside K200B2 [message #10584 is a reply to message #10269] |
Mon, 02 March 2009 23:13 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
WVTom
Messages: 16 Registered: January 2009 Location: West Virginia
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Junior Member |
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Pleat,
I did replace the original Jensen with an 8 ohm Jensen. I had heard or was told by someone at some point in time that these were 8 ohm speakers.
I am looking at the old speaker pulled out of the cabinet at the time of the replacement. It is marked 30410 C8774-4R C12N 220046.
Stamped on the back of the speaker baffling is 42W9902. I did replace the original with a C12N from Jensen.
Of course all of the above is just extra regarding your post about the ohms. Are the original speakers 8 or 16 ohms? If I should have a 16 ohm in the cabinet, I'd rather get one and keep things in the proper order.
Thanks for your post.
Tom
Kustom K200B-2 w/ 3 12's
Fender Vibro Champ (72) Given to my son
1970-72 Gibson SG w/ Bigsby per Ser. # Also given to my son
2005 Taylor T5 - C2 (Koa)
Alvarez AJ60
2010 Taylor 814ce Tobacco Burst
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Re: Looked inside K200B2 [message #10591 is a reply to message #10585] |
Tue, 03 March 2009 17:04 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
WVTom
Messages: 16 Registered: January 2009 Location: West Virginia
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Junior Member |
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Thanks for the additional information regarding the speaker ohms. I doubt I will ever take the opportunity to crank the amp up, but one never knows.
I believe I'll start looking at various web-sites searching for a 16 ohm Jensen. It would really be nice to find an original replacement, or a replacement model with the chrome center. I have searched many times for one, but never located it yet.
As for the 8 ohm speaker, I have another amp which has a 8 ohm 12 in it (marked on the amp). Before placing the Jensen in the Kustom cabinet, I hooked it up to the other amp and there was a world of difference in the tone quality. I'll just move the 8 ohm to the other amp when I pick up a 16 ohm speaker.
If anyone has suggestions for a good replacement other than the Jensen, let me know.
Thanks again....Tom
Tom
Kustom K200B-2 w/ 3 12's
Fender Vibro Champ (72) Given to my son
1970-72 Gibson SG w/ Bigsby per Ser. # Also given to my son
2005 Taylor T5 - C2 (Koa)
Alvarez AJ60
2010 Taylor 814ce Tobacco Burst
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Re: Looked inside K200B2 [message #10598 is a reply to message #10269] |
Thu, 05 March 2009 08:25 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
rodak
Messages: 515 Registered: October 2001 Location: Georgia
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Senior Member |
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Can you just put the aluminum caps over the existing paper dome, or is it better to replace it? If the latter, how do you go about replacing it?
Another good source for the JBL domes is Weber Speakers: www.tedweber.com. Terrific guy to deal with, and extremely knowledgable about all things speakers.
www.combo-organ.com
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Re: Looked inside K200B2 [message #10599 is a reply to message #10598] |
Thu, 05 March 2009 11:39 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
chicagobill
Messages: 2005 Registered: April 2003
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Senior Member |
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I think it depends upon a couple of factors. If the original paper dome is solid and not vented, and the new metal dome doesn't touch it when in position, the metal dome can be glued in over the original.
Most likely though the metal dome will be flatter than the original one, so the paper one will need to be cut out first. It can be removed with a sharp knife. I'd just cut it off right at the glue line, being careful not to cut the cone itself.
If the original dust cap is vented, the new metal cap should also be vented. These are the metal caps that look like they have a black dot in the center of them. This is actually a mesh or screen covered hole.
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Re: Looked inside K200B2 [message #10612 is a reply to message #10269] |
Sat, 07 March 2009 13:25 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) ![Go to next message Go to next message](/FUDforum/theme/vk30/images/down.png) |
rodak
Messages: 515 Registered: October 2001 Location: Georgia
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Senior Member |
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Thanks for the info. I guess I'd rather replace the existing paper cap, if possible, to avoid affecting the high-freq response (I guess this would be less of an issue for larger speakers, right)?
What sort of precautions should be taken to avoid getting foreign particle in the voice coil gap? I'd be afraid of having bits drop down in there while cutting the paper cap off. i guess I could do it upside down.
I don't have any plans to do this now, just reaearching in case I ever have the need to.
www.combo-organ.com
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Re: Looked inside K200B2 [message #10617 is a reply to message #10269] |
Mon, 09 March 2009 06:23 ![Go to previous message Go to previous message](/FUDforum/theme/vk30/images/up.png) |
stevem
Messages: 4767 Registered: June 2004 Location: NY
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Senior Member |
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As long as what might fall in the gap is not magnetic you can vacume it it out.
Also if you hav someome hold the speaker on edge while you cut on the lower side of the dome nothing will fall in anyway.
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