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Author Topic: 6JS6C versus 6LB6  (Read 3735 times)
IZ2HDN
Member

Posts: 24




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« on: February 09, 2009, 07:22:41 AM »

good morning all,
i recently bought an old FT101E.
I have to replace the two finals 6JS6C.
I only found 6LB6 instead.
Does anybody know if 6JS6C are fully compatible with 6LB6?
best '73 de IZ2 HDN Max
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AD4U
Member

Posts: 2177




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« Reply #1 on: February 09, 2009, 07:26:46 AM »

This question has been discussed often on the Yaesu Fox Tango site.  From several posts there, some people have found the 6LB6 to be a direct substitute for the 6JS6C.  Personally I would stay with the 6JS6C unless you cannot find any.

Dick  AD4U
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IZ2HDN
Member

Posts: 24




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« Reply #2 on: February 09, 2009, 07:32:12 AM »

Many thanks Dick for quick reply.Unfortunately it seems that i have no other choice.
I am any any case looking for another supplier.
In case i am not lucky i have to go for the 6LB6.
As far as you know are any modifications needed if 6LB6 are installed?
best 73
Max
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AD4U
Member

Posts: 2177




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« Reply #3 on: February 09, 2009, 09:38:10 AM »

Max:

I did a GOOGLE search for:

6LB6 FT-101

I got 273 "hits".  There is all kinds of info on using 6LB6 tubes in a Yaesu FT-101 type transceiver.  This should answer your questions.

Dick  AD4U
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KE3WD
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Posts: 5689




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« Reply #4 on: February 09, 2009, 09:51:18 AM »

You may find that you have to add a few pF in series with the variable neutralization capacitor to get it to neutralize.  

Typical value is 10 to 20pF fixed.  

Don't trust my memory on the pinout, been too many years to remember the details of that, CHECK THE PINOUT carefully to make sure it is a direct plugin replacement first.  
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KE3WD
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Posts: 5689




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« Reply #5 on: February 09, 2009, 09:55:54 AM »

As previously mentioned, FOX TANGO website is THE place to get tried and true good information on the 101's.  

Do not hesitate to contact them.  

Join the Yahoo Group and ask questions.  


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DJWHYTE30
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Posts: 29




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« Reply #6 on: February 09, 2009, 12:51:39 PM »

For what it's worth!

I purchased a Yaesu FT-101EE a few months ago and decided that I should have replacement tubes. I went on eBay and found a pair of original Toshiba 'Green Banded' 6JS6C tubes for $40! With these tubes, no modifications of any sort are required.
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N6AJR
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Posts: 9921




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« Reply #7 on: February 09, 2009, 03:01:34 PM »

6js6c, 6lq6 and 6mj6 are all equivlents If my memory serves I don't remember where the 6146 fits in.
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WD7Z
Member

Posts: 63




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« Reply #8 on: February 09, 2009, 04:42:18 PM »

>...6js6c, 6lq6 and 6mj6 are all equivlents

6je6, 6lq6 and 6mj6.

6js6c is a different animal.  If you use american 6js6c's in an ft101x, you do have to change the fixed capacitor that is series with the nuetraling capacitor from 100pf to 10pf.  There has been some discussion of sub tubes on the yahoo groups.

john wd7z


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