[time-nuts] Simulation

[J. Forster]

Somebody read the resistor code backwards then? Easy enough if you don't
know what you're doing w/ Established Reliability parts.

-John

=============


> 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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>
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