.......
>I just picked up a BTI LK-2000D amp and was wondering if anybody else on
> this reflector has had one/used one
>in the past years. It's got a 3-1000Z tube and from what I'm told puts
>out 'just fine'.
>
>I plan to use it only between 80-20mtrs and just need your comments
>good/bad.
.......
>Before I light it up, I do plan to carefully inspect the bandswitch and
>remove all corrosion areas [if any].
>
Corrosion is not a common problem with the BTI bandswitch, Chris. Look
for melted/evaporated contacts and burn marks on the
porcelain---especially at the 10m and 15m switch positions.
>Rich: I do realize that yes it is a 3-1000z and is prone to 'parasitics' on
15 & 10mtrs,
I don't think so.
>...but I
> don't plan to use it up there. ...
I have never heard of a BTI bandswitch sustaining parasitic arc damage
during operation on 10m. 80m, 40m, 20m, yes.
- If one uses a stock BTI with a modern transciever, the BTI is virtually
certain to hotswitch, which means current transients---which encourage
VHF parasites.
- A number of BTI owners have replaced the kaput, stock electrolytic
filter capacitors with an increased number of units to raise the max.
voltage capability of the hv filter capacitor bank. I recommend using
Matsushita 100k ohm 3w MOF resistors to equalize the voltage across the
capacitors. They produce less heat than the original values, plus they
are quite stable and reliable.
A step-start would be nice, and easy too---using the original,
molasssas-in-winter BTI t/r relay. A schematic is available at:
http://www.vcnet.com/measures
Rich---
R. L. Measures, 805-386-3734, AG6K
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|