[TenTec] Century 22

[Bob McGraw K4TAX]

I searched Amazon and E-Bay.  I did find the devices to be available at 
reasonable prices.

73

Bob, K4TAX


On 6/15/2020 11:23 PM, Josh Gibbs wrote:
> Thank you very much for the files Bob!
>
> Ten-Tec replaced both the MRF-476 drivers and the MRF-475 finals with
> Mitsubishi 2SC1969. I checked with RF Parts and 2SC1969 is NLA.
>
> Anyone on the list have a source for these? A bit of web searching turned
> up a company called Eleflow who is reproducing them, but I found a lot of
> mixed reviews (mostly CB related stuff!).
>
> Thanks,
>
> -Josh WU7H
>
>
> On Sun, Jun 14, 2020 at 7:41 AM Bob, WB2VUF <wb2vuf at verizon.net> wrote:
>
>> Hi, Josh,
>>
>> Congratulations!  The Century 22 is a very nice rig.  I bought one used
>> some years ago.  They are quite rare, but get very good ratings.  It's a
>> good rig for casual operating and nets. It isn't so good for contests on a
>> crowded band because being direct conversion, you get QRM from both sides
>> of zero beat.  However, the audio filter is excellent.
>>
>> A word of caution:  It is important to use the original power supply and
>> to make sure that the current limit is set correctly, or use a fast-acting
>> 5 Amp circuit breaker in the 13.8 V line.  The C-22 has no internal SWR
>> protection, so without current limiting or a breaker, a few dits
>> transmitted into the wrong antenna will destroy the finals instantly.  I
>> learned this the hard way.
>>
>> I have  a scan of the manual which I will send you.  It's a little better
>> quality than the Ten Tec scan.  I got it off the G3YCC web site. My copy
>> has some typed notes from G3VTT on the table of contents page regarding
>> bias settings and final replacement.  Ten Tec replaced the original MRF-475
>> finals and MRF-476 drivers with the 2SC1969, which are more robust.
>> Genuine Mitsubishi 2SC1969s are available from RF Parts Co.   Beware of
>> on-line sellers who market counterfeit 2SC1969s for the CB market.
>>
>> 73,
>>
>> Bob WB2VUF
>> <#m_-8709170805919571873_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>>
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