[time-nuts] Simulation

[Mike Feher]

I only mentioned the yellow band because of reliability. Seems like the
original resistor was 220 ohms and the one that actually met the required NF
was 330 (or the other way around). So, it was not the yellow band that had
to be changed. - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960




-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of J. Forster
Sent: Saturday, August 14, 2010 9:43 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Simulation

??  The yellow banded R means established reliability. I see no reason why
the NF should be any different then one w/o the yellow band. They are the
same part, only one is tested more.

Not white band perchance?

-John

===========


> Yes, I guess it was. I have been in the military business since 1967, and,
> certainly seen my share. Besides all of the screw ups, there was one that
> really took the cake. I once worked for a company that had to build a
> radio
> that was strictly build-to-print. The original drawing had a mil-spec
> yellow
> band resistor of value X in the front end. Well, with that resistor the NF
> could not be met. They could meet it with a value Y. Pleading with the
> government reps made no difference. Finally, the head of the company QA
> department wrote a letter to AB and actually asked them to provide
> resistors
> with value Y, but, color code them with the value X. Everyone signed off
> on
> it, and, everything was fine. I still have a copy of the letter someplace.
> I
> just got back from Fort Bragg where I was involved in certifying a system
> at
> Ka band. The antenna is a 30 footer and had only a 10 degree elevation
> look
> angle to see the bird needed. Well, guess what? There are three 30 foot
> dishes in the system, the other two being Ku, and this antenna was between
> them looking right through one of the Ku antennas. Really messed with the
> patterns. Now, based on my input they are changing the feed assembly and
> all
> of the RF between the two antennas to prevent the blockage. It will take a
> month. I am sure I will be there again. A few simple examples of hundreds.
> - Regards - Mike
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
>
>
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of GandalfG8 at aol.com
> Sent: Saturday, August 14, 2010 6:52 PM
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Simulation
>
>
> In a message dated 14/08/2010 23:39:20 GMT Daylight Time,
> mfeher at eozinc.com
>  writes:
>
> Not that  it really matters for this thread, but, the 2N2222A was one of
> the
> most  common NPNs and not PNPs. As I recall, the 2N2907A was its PNP
> complement.  - regards - Mike
>
>
> ------------------
> Wasn't that exactly the point that was being made?:-)
>
> regards
>
> Nigel
> GM8PZR
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