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Re: K200 B4 [message #26809 is a reply to message #26807]

Thu, 19 July 2018 14:23

sskydiver1
Messages: 27
Registered: December 2008
Location: Texas

Junior Member

So Chicagobill and all -

More news to report.

The sudden drastic drop in volume was due to this:

I BLEW the speaker.

It is ripped from the basket almost all the way around - and I'm sad to report it was a vintage 1959 Jensen Alnico that I had used many times to test amp heads without issue.

I am 90% positive that I blew the speaker by turning the Selective Boost switch at loud volume - which was making a hell of a pop when "changing frequencies" (as this is what the switch does).

Lesson learned: Don't do that! Just moving the dirty switch (which obviously needs some contact cleaner) at low or no volume cleaned it up well enough to minimize the popping.

So I plugged the K200B4 into a different cab and it works fine-ish EXCEPT:

It has a lot more of the inherent white noise than another basic K200 I have in my collection.

I reviewed earlier posts from you in response to a similar issue Bill -

Does that sound like a bad cap to you? It is definitely the same basic "White Noise" hum as the basic K200 but at least twice as loud as the other K200B4.

Finally - is my research at all correct that the speaker output from the K200 head is 4ohm?

Many thanks again Chicagobill

Derek

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[Message index]

		K200 B4 By: sskydiver1 on Tue, 17 July 2018 23:08
		Re: K200 B4 By: chicagobill on Tue, 17 July 2018 23:51
		Re: K200 B4 By: sskydiver1 on Wed, 18 July 2018 10:40
		Re: K200 B4 By: chicagobill on Wed, 18 July 2018 12:20
		Re: K200 B4 By: sskydiver1 on Wed, 18 July 2018 16:13
		Re: K200 B4 By: sskydiver1 on Thu, 19 July 2018 14:23

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