[time-nuts] homebrew 13 dBm distribution amplifier based on NIST design 5 to 100 MHz

Lux, James P james.p.lux at jpl.nasa.gov
Fri Sep 26 21:48:47 UTC 2008




On 9/26/08 2:36 PM, "Gerhard Hoffmann" <dk4xp at hoffmann-hochfrequenz.de>
wrote:

> On Fri, 26 Sep 2008 16:21:49 -0400, you wrote:
>
>>>> For maximum phase stability the BNC connectors should replaced by
>>>> threaded connectors such as TNC, SMA , N etc.
>>>
>>> The next iteration will have to live with BNC because R&S smpd, hp8662A,
>>> SNA-33 & friends all have BNCs and the holes in the 19" front plate of
>>> my GPS disciplined XO are drilled already.
>>
>> TNCs will fit the same hole as will BNCs.
>
> I won't change the 8662A; as long as it works I will not open it.
> Hopefully for a long time. Its 10811 is probably better than
> the MTI 230 in the GPS, noisewise.
>
> I would like to limit this  to BNC, N, SMA and maybe APC / K  where it
> cannot be avoided.
> The number of converters required goes up with (n+1)**2,
> the +1 for male/female. And that's optimistic.

If you need >18GHz performance, then I think 2.4mm is a better choice than
K. It's awfully easy to screw up the center conductor of a K connector with
a SMA that's not properly assembled.







More information about the Time-nuts_lists.febo.com mailing list