[TenTec] Century 22 Info
Bwana Bob
wb2vuf at verizon.net
Wed Oct 3 19:58:09 EDT 2012
Tim:
Me too. I can't leave anything alone.
Check and see if you have the filter mod. If the receive audio peaks at
too high a frequency, you need the mod.
Other fixes and mods that I know about:
Because of reliability problems, Ten-Tec replaced the MRF-476 drivers
and MRF-475 final with 2SC1969 transistors.
If you don't have the built-in calibrator, Mike Bryce WB8VGE has a kit
that will fit.
Likewise, the internal keyer can be duplicated because it is a simple
circuit or one of the many keyer-on-a-chip kits can be installed.
If you have low drive on 80 meters only, try peaking the "null" pot on
the osc/mixer/bandpass board, while transmitting into a dummy load. It
is best to do this with a 30 MHz 'scope, because Ten-Tec says that the
pot should be tuned for minimum waveform distortion.
One mod I'd like to add is an external digital display. The analog dial
could be replaced with a small digital display, but I wouldn't do this
because it would destroy the classic character if the rig.
73,
Bob WB2VUF
On 10/2/2012 9:32 PM, Timothy Randa wrote:
> Thanks Bob...I guess I'm always looking to make things better
>
> 73 de Tim
>
> On Tue, Oct 2, 2012 at 8:00 PM, Bwana Bob <wb2vuf at verizon.net> wrote:
>
>> Tim:
>>
>> I'm not aware of any mods other than changing the caps in the audio filter
>> to correct a design error (the filter was tuned to the wrong frequency).
>> This is on the Ten-Tec wiki. I found bias adjust instructions on a British
>> web site. I don't know of any other mods.
>>
>> 73,
>>
>> Bob WB2VUF
>>
>>
>> On 9/29/2012 12:44 PM, Tim Randa wrote:
>>
>>> Is there a web site with all the mods for the Century 22? I understand
>>> the factory issued several service bulletins and have found some notes of
>>> mods here and there on the web. Just hoping that there was one location
>>> that might have all this info together.
>>>
>>> 73 de Tim K0FL
>>>
>>>
>>> ______________________________**_________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/**mailman/listinfo/tentec<http://lists.contesting.com/mailman/listinfo/tentec>
>>>
>>>
>>> -----
>>> No virus found in this message.
>>> Checked by AVG - www.avg.com
>>> Version: 2012.0.2221 / Virus Database: 2441/5301 - Release Date: 09/30/12
>>>
>>>
>>>
>> ______________________________**_________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/**mailman/listinfo/tentec<http://lists.contesting.com/mailman/listinfo/tentec>
>>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2221 / Virus Database: 2441/5305 - Release Date: 10/02/12
>
>
More information about the TenTec
mailing list