[Elecraft] XV144 XV50: LED brightness

2012-09-10 Thread David G4DMP 
I have noticed a significant difference in the brightness of the LEDs in
my XV144 and XV50 transverters.

Sorry there are no serial numbers, but my XV144 was purchased in July
2004 (with Manual Rev.B, November 7, 2003).

My XV50 (now modified for 70MHz) was built according to the Assembly
Manual, Rev.C 22 January 2007  Owner's Manual Rev.D, April 11, 2007.

The LEDs on the, later, XV50 are very much brighter than the earlier
XV144.  Both have exactly the same supply voltage of 13.95V.

Comparing the component values and front panel schematic diagrams of
both transverters, they appear to be identical.

I would interested to know whether other people with multiple XV
transverters are finding the same differences in brightness. Could it be
that Elecraft changed the types of LED supplied in the kits over the
years?

73 de David G4DMP

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Re: [Elecraft] XV144 XV50: LED brightness

2012-09-10 Thread David Pratt 
Thank you, Jim, that does make a great deal of sense. Many thanks for
taking the trouble of replying.

73 de David G4DMP

In a recent message, Jim Miller KG0KP jimmil...@stl-online.net writes

[snip]
There is no doubt that the LEDs they were getting in 2004 have been
discontinued with brighter and lower current drain being the ones of
today.
[snip]
- Original Message - From: David G4DMP
[snip]
 The LEDs on the, later, XV50 are very much brighter than the earlier
 XV144.  Both have exactly the same supply voltage of 13.95V.
[snip]

-- 
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +

-- 
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +

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