[Boatanchors] Bird Termaline Question

[D C _Mac_ Macdonald]

I grabbed my Termaline 100-T-FN (labeled 100W, 50 Ohm) and it showed at 51.2 Ohms on my Fluke 77, Series 2.


I suspect both of those loads have been overloaded in the past which might have caused the discrepancy.


A call or note to Bird should confirm a possible cause.  Equipment that goes out of specification at a government facility is likely to have shown up in a redistribution and marketing facility as "scrap."  Government-owned test equipment undergoes periodic inspection in calibration labs on a regular basis.  Look for an inspection tag/sticker on the device to get an idea as to when it might have been checked.


You can carry a cheap (or otherwise) Digital Multimeter with you to hamfests and get a pretty good idea if a "load" that interest you is even close to what it claims to be.  Even the cheapies from Horror Fright should be within 2 to 3% at worst!


* * * * * * * * * * *
* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* Oklahoma City, OK *
* USAF, Ret'd 61-81 *
** FAA, Ret'd 94-10 *
* * * * * * * * * * *

( ex Ground Radio Tech)




________________________________
From: Boatanchors <boatanchors-bounces at mailman.qth.net> on behalf of W4MIL via Boatanchors <boatanchors at mailman.qth.net>
Sent: Saturday, February 4, 2017 14:13
To: w5jv at hotmail.com; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Bird Termaline Question


W5JV and group.

I have the same TERMALINE, Model 8135, Serial 12964.

Had it for years.  It measures 72.6 ohms with my Beckman DM-27-XT.  Label says 50 ohms/150watts.

Always figured it was a manufacturing error.

73
Chuck
W4MIL




チャーリー ミルトン







-----Original Message-----
From: Doug Hensley <w5jv at hotmail.com>
To: test-equipment <test-equipment at mailman.qth.net>; boatanchors mailman.qth.net <boatanchors at mailman.qth.net>
Sent: Sat, Feb 4, 2017 2:18 pm
Subject: [Boatanchors] Bird Termaline Question

I just received what was supposed to be and what certainly looks like a NOS (new old stock) Bird Termaline dummy load.  The label is marked 150 Watt, 50 Ohm.


When I put my Fluke meter on it, it measures 73.5 ohms.  Not the kind of response I get from my old Heathkit cantenna nor my OHR RFL-100 which is like 50.1 ohms.


Has anyone seen this problem or heard about it?  Could Bird have made a mistake or could the vendor have swapped labels?


Thank you,


Doug W5JV






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