Mark,
You caught me at the hotel room computer. The EMTRON DX-3 review is
not on this machine. I will send it to you on Sunday night.
1. The EMTRON DX-series of amplifiers are experiencing a breakdown
where the plate current swings all the way to max and the 600 volt
line
fuses blow and there are no spare parts to fix them, or reasons why
this happens.
2. There are ten amplifiers that have recently failed this way waiting
for repair
in Virginia, and they are going to be returned to their owners when
the
ex-Emtron repair person receives money to ship them back without
being
repaired.
3. The nomenclature on small electronic devices in the DX-series
amplifiers has
been systematically erased and sanded off to prevent duplication of
the boards or
non-authorized repairs or redesigns from being done.
4. The schematic diagram appearing in the owners manuals is tacitally
incorrect.
5. The American Repair facility has been waiting for over one year for
spare parts.
6. The Russian doorknob capacitors are KVI-3 and are not rated for RF
Power service
and may heat up, short circuit and explode with no warning.
7. The exhaust pulling fan is half the CFM capacity of the pusher fan and
the buildup of
residual air pressure in the final tube plenum means a drastic loss
of tube cooling
air flow at best and a destroyed output tube at worst.
8. The tube sockets are manufactured in the mid 1960's. The tube itself
in my
test amplifier was manufactured in 1990. The manufacturer does not
state that
the amplifiers are "used" or "recycled" at any point and this is a
misrepresentation.
9. If the vacuum relay burns out it will be necessary to remove the
controller board. No
spare controller boards are available if the board is damaged.
10. The GU-78b tube is no longer being manufactured and when stock is
depleted the
amplifiers will not have any source of substitute devices.
Please contact me if you require further facts about the EMTRON DX-3.
Hal Mandel
KA1XO
On Fri, 27 Feb 2004 09:59:24 +0100 "Mark Demeuleneere" <on4ww@pandora.be>
writes:
> I'm about to change my trusted LK-800 for a new amp. My eyes fell on
> the
> DX-3 from Emtron.
>
> Would appreciate some input from Emtron amp owners. Plus points,
> minus
> points.
>
> Kindly reply to me privately, will post excerpt summary without call
> signs.
>
> 73 - Mark
>
> Stories and pictures on ON4WW's travels are on the following URLs :
> http://www.qsl.net/on4ww and http://users.pandora.be/on4ww
>
>
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>
>
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