[Boatanchors] 5U4 & 6X4 replacements.

[W2HX]

73 Eugene W2HX


-----Original Message-----
From: Carl [mailto:km1h at jeremy.mv.com] 
Sent: Sunday, November 07, 2010 3:40 PM
To: Eugene Hertz; 'Kim Herron'; Ken
Cc: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] 5U4 & 6X4 replacements.

My 100V still has the 6AU4 tubes I installed shortly before I sold it in 
1992 and bought it back a little over 2 weeks ago. It was used very little 
as Id also sold him a 200V which he restored and uses regularly. Personally,

I much prefer the 100V and had only used the 200V in the second station for 
multiplier chasing while contesting. Both had modified 75A4's and NCL-2000 
amps. I still have one of each.

Modern diodes havent required equalizing resistors in decades and Id much 
prefer 1N5408's if I were inclined to go SS in any rig. However with the 
high line voltage of today and the higher B+ from SS, Id tend to not want to

stress the 6550's any more than they already are. Ive seen what audiophools 
are paying for real USA made Tung Sols!

My own energies are restuffing the electrolytics top and bottom to preserve 
the appearance. The prior owner had installed a repainted and screened front

panel, it looks better than when I first purchased the rig in 1965.

Carl
KM1H




----- Original Message ----- 
From: "W2HX" <w2hx at w2hx.com>
To: "'Kim Herron'" <kim.herron at sbcglobal.net>; "Ken" <n5cm at rtconline.com>
Cc: <boatanchors at mailman.qth.net>
Sent: Sunday, November 07, 2010 1:47 PM
Subject: Re: [Boatanchors] 5U4 & 6X4 replacements.


Here's what I did for my CE-100V that uses two 6AU4.

http://www.w2hx.com/x/CE-100V/Schematic.pdf  (shows how I connected the
diodes and resistors)

Here are some photos.

http://www.w2hx.com/x/CE-100V  (look at them in sequence to see how I
assembled it)

final picture is them installed in the CE-100V transmitter.  Hope this
helps!


73 Eugene W2HX


-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Kim Herron
Sent: Sunday, November 07, 2010 9:25 AM
To: Ken
Cc: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] 5U4 & 6X4 replacements.

Morning Ken!!

Easiest way to do that is to use a octal tube base that has pins 2, 5 and
8
and put 1N4007 diodes in there. I've been doing that for years. If you
need
more current capability, then use some 3 amp diodes rated at 1000VDC.
That's
what you'll have if you get some potted equivalents for the rectifiers you
mentioned. Put some silicone in the hole to insulate the diode and you are
there!!
Kim Herron W8ZV
kim.herron at sbcglobal.net
1-616-677-3706




________________________________
From: Ken <n5cm at rtconline.com>
To: boatanchors at mailman.qth.net
Sent: Sun, November 7, 2010 8:13:04 AM
Subject: [Boatanchors] 5U4 & 6X4 replacements.

Fellows,

I need recommented solid state replacements for the 5U4 and 6X4
tubes. Thanks,

Ken N5CM




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