Topband: New MFJ 259C available

[Carl]

I have the B&H microscope, stand, light, table, etc as well as a hot plate 
and access to a bonder when needed. Plus various knives, blades, scalpels, 
gold plated needle point iron, etc for fine tuning (-;

I still do a bit of prototyping for former employers and stuff for myself to 
24 GHz. Its down at HF I need to improve some of the test equipment.

Carl
KM1H




Sent: Tuesday, March 04, 2014 3:19 PM
Subject: RE: Topband: New MFJ 259C available


> Well, SMA is probably the most generally useful. With the adaptors in 
> place,
> we just have to make sure that we include the adaptors in our 
> calibrations.
> When it gets to be really "witchy" is when we need to calibrate a 
> miniature
> coax or semi-rigid line to solder into a PC board to measure at the input 
> of
> an IC, or balun, or printed antenna etc. Then we have to trim the line 
> very
> carefully and tack tiny surface mount 50 ohm and 0-ohm resistors across 
> the
> line to calibrate - each step being done under a microscope! Tedious - but
> it can be done!
>
> 73,
> Charlie, K4OTV
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Carl
> Sent: Tuesday, March 04, 2014 3:01 PM
> To: Charlie Cunningham; jim at audiosystemsgroup.com; topband at contesting.com
> Subject: Re: Topband: New MFJ 259C available
>
> SMA for the 24GHz, open, thru and short. I also have high end adaptors to 
> N,
>
> APC, etc.
>
> There may even be an old type N cal kit from "back in the eighties"
>
> Carl
> KM1H
>
>
> ----- Original Message ----- 
> From: "Charlie Cunningham" <charlie-cunningham at nc.rr.com>
> To: "'Carl'" <km1h at jeremy.mv.com>; <jim at audiosystemsgroup.com>;
> <topband at contesting.com>
> Sent: Tuesday, March 04, 2014 2:53 PM
> Subject: RE: Topband: New MFJ 259C available
>
>
>> Those should surely be accurate enough, but what kind of connectors?
>>
>> Charlie, K4OT V
>>
>> -----Original Message-----
>> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Carl
>> Sent: Tuesday, March 04, 2014 2:41 PM
>> To: jim at audiosystemsgroup.com; topband at contesting.com
>> Subject: Re: Topband: New MFJ 259C available
>>
>> Can HP microwave loads be used? I have a set good to 24 GHz and another 
>> to
>> 50 GHz.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message ----- 
>> From: "Jim Brown" <jim at audiosystemsgroup.com>
>> To: <topband at contesting.com>
>> Sent: Tuesday, March 04, 2014 1:35 PM
>> Subject: Re: Topband: New MFJ 259C available
>>
>>
>>> On 3/4/2014 7:25 AM, Paul Christensen wrote:
>>>> My only concern with the VNWA is in its ability to measure Topband
>>>> antenna systems where sweeps are required into the AMBC band.
>>>
>>> I'm a VERY happy owner of the 3E model VNWA. I've made measurements on 
>>> my
>>> 160M antennas with no difficulty, but I'm out in the boonies, not close
>>> enough to strong BC signals to have seen any issues.
>>>
>>> As to precision of calibration loads -- after I got the VNWA, I did a
>>> search looking for calibration loads, and quickly learned that if you
>>> want
>>
>>> better than 1% precision, it's easy to spend as much for the load as for
>>> the VNWA itself!
>>>
>>> 73, Jim K9YC
>>> _________________
>>> Topband Reflector Archives - http://www.contesting.com/_topband
>>>
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>>
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>
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