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Reviews Categories | Amplifiers: RF Power - HF & HF+6M | BTI LK-2000 Help

Reviews Summary for BTI LK-2000
BTI  LK-2000 Reviews: 6 Average rating: 5.0/5 MSRP: $795
Description: A nearly forgotten gem from 1966, the BTI runs a 3-1000z. Producing max legal input of 2000+ watts PEP. Easy to load. Grounded grid, zero bias linear Full loading on all amateur band 80-10. Output easily reaches 1400w on 20m. A good tube should last you a lifetime....image the modern legal limit on just one tube. If you can find one of these in good shape, go for it. Quiet and easy to operate. Weight 115 lbs. 16wx 16d x 30h. Manual available:
Product is not in production.
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KH6VP Rating: 5/5 Nov 11, 2014 05:33 Send this review to a friend
Excellent Linear  Time owned: 0 to 3 months
This is one of those little gems, no one really knows much about.

BTI, which was based in San Diego, CA, released this 3-1000Z based floor standing linear amplifier in the mid sixties. It was advertized in magazines such as CQ, 73 and QST, and these ads can be found online.
My LK-2000HD was discovered at an auction in Reno, Nevada for $250. It is in really in great shape (only little cleaning was required to make it new again).

The whole unit was disassembled (the castor wheel plate, the RF Deck, the metal door and cover, the tube, the HV transformer and the power supply) and shipped inside my luggage and re-assembled. Easy to do.

Works great and produces just under 1500W when driven with 75W.

Lots of space for experimentation. The cabinet is mainly empty!

There are 3-1000Z tubes to be found although it can easily use the cheaper 4-1000A instead.

It joins my collection of TenTec Titan 425, Heathkit SB-220, Heathkit SB-200, Kenwood TL-922, Amp Supply LK-1000 and LK-1000A.
NX7U Rating: 5/5 Jun 6, 2006 08:26 Send this review to a friend
A beauty  Time owned: more than 12 months
A beauty legal-limit amp. Easy tuning, surprisingly quiet, and easy to work on.
Nice stock features include: blower continues for 1 min. after power off for add'l cooling; Pi-L output network, front-panel selection of integrated dummy load for tuning (BTI made a DL-2000, but for a 110VAC dowkey you can easily integrate your own dummy). I added my own soft-start for the plate xfmr, easy to do with plenty of volume in the PS cabinet.
One thing to note is that there are apparently a lot of "sub-models" to the LK-2000. If you can get a late-date manual all the variations are listed. There is an "HD" model with 10 320uF caps and a bigger transformer, but since you could buy an upgrade from BTI, it may not be indicated on the unit! Mine is an HD but the only way to tell is to take the PS cabinet apart.
One other minor thing is that it is easy to accidentally tune for the 2nd harmonic on 80m...remember the load cap should be set higher on 80m than 40m!
I'll sell mine when I go SK...but I'm relatively young so don't hold yer breath...
W8IDL Rating: 5/5 Mar 4, 2006 13:08 Send this review to a friend
A Real Gem!  Time owned: more than 12 months
This is a GREAT hf amplifier, my all time favorite. The 3-1000z is a sweet tube that takes a great deal of punishment and keeps ticking along. A 4-1000 can even be pressed into service if a 3-1000 is not available! The amplifier and power supply are built to perform well for the long haul. The early units have the glass chimney for forced air cooling and the later production amps have no chimney, but a unique base and side-pipe forced air cooling method. The spot temperature (those little infared spot thermometers are handy) of the tube top indicates the later method is a little more efficient. At any rate, people who own these amps tend to keep them, so they can be somewhat difficult to find. Get the matching DL-2000 dummy load if it is available, as they are very handy for tune-up, and are switched in and out with a front panel switch.
VE7IT Rating: 5/5 Feb 14, 2005 21:42 Send this review to a friend
A beast!  Time owned: more than 12 months
My first linear.... very impressive. This 80-10m amp is well built, easy to service and there is nothing like the sight of a 3-1000 with a glowing red plate and white hot filament. The 3-1000 is a large glass bottle about 6" dia and 8" tall. I got this amp with a spare tube and newly replaced HV caps and rectifiers. It has performed flawlessly although when loaded to about 1100 watts input, it sets off the smoke detectors in my house! A great ALC feature. Tubes are getting scarce, but the amp has lots of space and could be adapted to use many other 1kw+ tubes such as some of the low cost Russian stuff showing up on the internet. Requires 120-N-120 plus ground power connection (4 wires). Its heavy (115lbs) and does a great job of heating the shack.
K6VHP Rating: 5/5 Jul 17, 2004 17:03 Send this review to a friend
AWESOME  Time owned: 0 to 3 months
A really fine piece of equipment, my first legal limit amp. What a pleasure to own and operate this extremely well built amp. I couldn't ask for more! It's kinda fun watching the ol' PEP wattmeter hanging up in the 1000 to 1500 watt range. Interfaces and operates nicely with my Drake C-line...
WA2MGB Rating: 5/5 Sep 19, 2002 19:37 Send this review to a friend
A Forgotten Gem of the 1960's  Time owned: 0 to 3 months
I ran across old references to the BTI (Brad Thompson Industries) and finally found one still fully functional. It will run a 3-1000z or 4-1000a. Small, very quiet, and will easily and noislessly puts out 1400w on 20m and 1000w on 10m just to give you an idea. A good tube should last your lifetime. Pulls can be found, you don't want to price a new 3-1000z. A treat to use, very Collins like in appearance.

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