tubes age 110
------------------------------------------------------------------------------------------------------------
Subject: Re: [R-390] R390/Solid State
Date: Thu, 8 Aug 2002 16:31:53 -0700
The last thing you need to worry about wearing out in an R-390/R-390A are the
tubes. How many have you had to replace so far? You'll wear out the knobs
before you go though the thousands of hours available in standard tube life,
and the R-390 series treat tubes very gently.
---------------------------------------------------------------------------------------------------------
Date: Thu, 8 Aug 2002 19:38:33 EDT
Subject: Re: [R-390] R390/Solid State
33 R-390A's and 1 R-390 over a period of 23 years, I probably have replaced
less than 100 tubes, and that's counting old on the pallet 390's that were
missing tubes.
---------------------------------------------------------------------------------------------------------
Subject: RE: [R-390] R390/Solid State
Date: Thu, 8 Aug 2002 19:56:43 -0400
I bought my 2 R-390A's in completely original condition 18 years ago from a
ham who was a retired AF officer. One is a 1955 Collins and the other is a
Motorola. He used them for a number of years as he got them from a direct
surplus sale. I've been using them almost daily since I got them and I never
had to replace a tube. One of my R-392's has been in my possession since
1981 and the person who owned it before me had it for almost 15 years. It's
been in frequent use for at least 35 years so far and it's still on its original
tubes. Another receiver I own, a 1955 vintage German Siemens E305
professional HF receiver I got in 1969 and is also frequently used still has the
original Siemens tubes in it and as far as I can tell, it still performs great. I did
an alignment procedure on it in 1981 to make sure everything is according to
the specs...
73, Meir WF2U
Landrum, SC
---------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------
Subject: RE: [R-390] R390/Solid State
Date: Thu, 8 Aug 2002 19:04:58 -0700
If anyone wants to replace the tubes more often they need only halve the value
of the cathode resistors. Then it might 'age' them faster... How about those old
(14 pages)
(10 pages)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commentaires sur ces manuels