[SixClub] SB-200 6 meter conversions

[kd4e]

Nice piece of work!

I have a GI-6b that I believe is identical to the GI-7b
except not good up into the 2m and above range - fine on
HF and 6M.  $35. including std USA shipping.

doc

KB0NLY wrote:
> I had an amp on 6m running 572b's, while it would make
> power it seemed to oscillate and tuning was very touchy.
> After a while of fighting it and talking to many other
> conversion owners I determined it was the best I was
> going to get out of it.  The tubes just aren't worth a
> darn at 6.  They glow red at 10m, pushing them higher in
> frequency they would look hot enough to melt.  I tried a
> new set of tubes, Taylor 572b's, and they did a little
> better, some more mods and adjustments helped some of the
> problems.  Eventually I got fed up with it and sold it.
> 
> I then had the opportunity to operate a station that used
> a SB-200 converted to a single GI7BT russian triode.
> Tuning was nice, clean output, very stable and easy to
> use.  I decided to build my own but couldn't get an
> affordable candidate for parts by this time.  I ended up
> finding a Yaesu FL-2100B that was damaged while being
> shipped, the meters smashed, a small dent on one back
> corner of the case.  I bought it and started to gut it
> and rebuild it.  A couple months of weekends later I had
> a half gallon amp that is very user friendly.  I only
> have one thing I would like to improve on it and that's a
> fan upgrade, the current AC fans In there are pretty low
> flow and I want to swap out for one or two higher output
> muffin fans.  However in its current configuration it
> doesn't get too hot to concern me.  I usually only push
> it to about 300w for casual use, though I have driven it
> to 500w a few times.
> 
> http://kb0nly.info/6mqro.html
> 
> One of these days I think I might actually get
> adventurous and build an amp using a pair of GI7BT's and
> see if I can get a full gallon out of them.
> 
> 73,
> 
> Scott KB0NLY

-- 

.Thanks! & 73, doc, KD4E
.Have an http://ultrafidian.com day!
.
.         |_|___|_|
.         | | & | |
.            {|
.     /\     {|
.    /  \    {|
.   / @  \   {|
.   | |~_|~~~~|
.   | -| |    |
.=================== http://kd4e.com
.Free OS : http://www.PuppyLinux.com
.Google Street View logs WiFi networks & Mac addresses
.Use http://Startpage.com instead - they respect privacy