[TowerTalk] TowerTalk Digest, Vol 180, Issue 26

[Wilson Lamb]

There's a math problem here too....
WL

> 
>    1. MFJ-998 autotuner problem (Roger D Johnson)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sat, 16 Dec 2017 15:10:03 -0500
> From: Roger D Johnson <n1rj at roadrunner.com>
> To: Towertalk Reflector <towertalk at contesting.com>
> Subject: [TowerTalk] MFJ-998 autotuner problem
> Message-ID: <4944bc09-0723-5f26-bbcc-e18002def723 at roadrunner.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
> 
> I recently discovered a problem with my MFJ-998 tuner that might also be a 
> problem with other tuners.
> 
> There are two banks of series/parallel capacitors that are switched on the input 
> side of the L network to
> 
> match low impedance loads. One bank consists of (8) 3900pf capacitors that total 
> 1950 pf. In my tuner
> 
> these caps were only 390pf!!
> 
> If these PC boards were populated using a machine getting parts from a reel, 
> there are probably more
> 
> tuners out there with the wrong caps.
> 
> 73, Roger N1RJ
> 
> 
> 
> 
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> 
> End of TowerTalk Digest, Vol 180, Issue 26
> ******************************************