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Kustom K200B5 Pilot Bulb replacement [message #9096]

Sun, 30 December 2007 14:09

ugmold
Messages: 10
Registered: December 2007

Junior Member

Hi folks,
1st post. I just picked up a K200B5, charcoal, in decent shape, sort of matches my 2x12 charcoal bottom (in great shape). It has a hiss to it, and the 3rd channel is barely audible, but my question is, does anyone have a Radio Shack bulb number for the pilot light? (I searched but found nothing for the K200B5)
Thanks,
ugmold

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Re: Kustom K200B5 Pilot Bulb replacement [message #9097 is a reply to message #9096]

Sun, 30 December 2007 17:23

LesS
Messages: 477
Registered: December 2002

Senior Member

Hi ugmold,

The bulb you need is an 1829.

It is 28 volts 70ma
(#1819 is 28 volts 40ma and will work but is not as bright as #1829)
Radio Shack carries only the #1819 bulb...their number is 272-1119 and it sells for $1.79.
Do not use a 6.3 volt bulb, it will make the resistor run too hot.

The output of the transformer is 42 volts - a 200 ohm resistor is wired in series with the bulb that reduces the voltage down to 28 volts.

Sources for bulbs:

www.Jameco.com
California
1-800-455-6119

www.mouser.com
Texas
1-800-346-6873
#1829 lamp - part # 606-CM1829 -$.74 each ($.64 each for 10 or more)

For Grainger store near you go to www.grainger.com (must have business account to order online)
#1829 lamp - Grainger part # 6VF92

www.ampwares.com

www.magicparts.com

[Updated on: Sun, 30 December 2007 17:28]

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Re: Kustom K200B5 Pilot Bulb replacement [message #9098 is a reply to message #9096]

Sun, 30 December 2007 18:58

ugmold
Messages: 10
Registered: December 2007

Junior Member

Terrific Thanks LesS!

BTW: Any aftermarket source for a 68 2x12 grill logo?

ugmold

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Re: Kustom K200B5 Pilot Bulb replacement [message #9099 is a reply to message #9096]

Mon, 31 December 2007 06:48

stevem
Messages: 4733
Registered: June 2004
Location: NY

Senior Member

No, no aftermarket, you missed one on ebay, I think it was last week.

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Re: Kustom K200B5 Pilot Bulb replacement [message #9100 is a reply to message #9096]

Mon, 31 December 2007 09:22

ugmold
Messages: 10
Registered: December 2007

Junior Member

I saw it, along with the chrome tubes. Didn't have the cash after buying the head and cab.

So do these heads, K200b5, humm/hiss a bit normally. I know its old, but wonder if it can be hushed.

I am also curious about 4 jacks on the right side of the back. 1 RCA and 3 others that I thought were added, but the wiring looks original inside. My guess is the RCA is for reverb, the others???

Thanks much,

ugmold

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Re: Kustom K200B5 Pilot Bulb replacement [message #9101 is a reply to message #9096]

Mon, 31 December 2007 12:14

stevem
Messages: 4733
Registered: June 2004
Location: NY

Senior Member

A little hiss is normal, these amps should only hum when you have the reverb turned up.
You can releave some of the hiss if you have the first 2 gain stages/transistors replaced with modern ones that make less hiss.
The RCA jack is a record output that can drive another amp should you ever want to, the two jacks nearest each other are the speaker outputs,the other jack is for the reverb foot switch.

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Re: Kustom K200B5 Pilot Bulb replacement [message #9103 is a reply to message #9096]

Mon, 31 December 2007 18:04

ugmold
Messages: 10
Registered: December 2007

Junior Member

Thanks,

Is it easy to swap the transistors? Or are they in the circuit boards?

BTW: The back of mine (will try to post a pict later) has 2 outs, upper left top, then 1 rca top right and on the right side, unevenly are 3 more 1/4 inch jacks.

ugmold

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Re: Kustom K200B5 Pilot Bulb replacement [message #9122 is a reply to message #9096]

Thu, 03 January 2008 06:34

stevem
Messages: 4733
Registered: June 2004
Location: NY

Senior Member

No, the transistors are on circuit boards, you would have to remove the control knobs to get access to the nuts that hold the boards to the face of the amp, and then unsolder them to do the swap.
It sounds like somebody has added extra jacks to the back, if they are hook up to something I would have to see a picture to see where the wires go.Than I may be able to guess what the jacks are for.

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