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Reviews Categories | Ham radio kits | Ten-Tec Universal BFO Kit #1050 Help

Reviews Summary for Ten-Tec Universal BFO Kit #1050
Ten-Tec Universal BFO Kit #1050 Reviews: 15 Average rating: 3.3/5 MSRP: $$10
Description: 455 kHz BFO kit
Product is in production.
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KC4FKX Rating: 4/5 May 30, 2010 11:27 Send this review to a friend
Simple to Build...Does the Job  Time owned: 0 to 3 months
I received an AM/FM/SW pocket radio from C.Crane (CCRadio-SWP) for Christmas. While I really like this radio it does not receive CW or SSB....until now! The kit is very simple and straight forward to build. Initial testing and setup is a breeze. I connected an alligator clip from the 455 KHz out to the antenna, connected a battery, set the radio to 4.032 MHZ (my favorite cw watering hole), set the pot to its mid-range setting, tuned the coil a turn or so and wham, the signal came in like gangbusters! The pot makes for a very nice fine tune adjustment. While I did experience a little hand capacitance I expect it will go away once everything is mounted in the suggested TP-13 aluminum case. Well worth the $11.
OLLIEOXEN27 Rating: 0/5 Nov 9, 2009 12:07 Send this review to a friend
drifts  Time owned: 0 to 3 months
Mine drifts and has to be retuned every 5-10 seconds plus there's usually a heterodyne floating around the signal. Also if the signal is much stronger than the oscillator signal it doesn't work (only weaker signals). Sad that a person wanting to listen to single sideband signals (a future ham perhaps?) should have this as their first experience. Probably turn him off to the hobby.
N4AUD Rating: 5/5 Mar 21, 2008 19:47 Send this review to a friend
Great accessory  Time owned: 6 to 12 months
The kit couldn't be any simpler, takes no time at all to assemble. It works as advertised. One thing I don't like about it is I have to adjust the can coil quite a bit if I move around much in a band. If I go from say 3900 khz to 3950 khz, I have to center the knob, then use an adjustment tool on the coil. No biggie, and it is a blast to listen to CW or SSB on a Transoceanic, or your favorite portable SW radio.
W8ZNX Rating: 5/5 Apr 1, 2007 10:38 Send this review to a friend
just the thing for that old GE or Zenith receiver  Time owned: more than 12 months
very very easy kit
once the soldering station is warmed up
takes less than 10 min to build
standard TenTec manual

works great

have used this with more than one
older shortwave receiver

80 cw late winter night
its fun during a qso
to send
rx hr is Zenith or Philco

dit dit Mac
NS6Y_ Rating: 3/5 Mar 22, 2006 22:03 Send this review to a friend
Univeral BFO the QRM's free  Time owned: 0 to 3 months
I got this in a box of stuff, and decided to build it, it was an early 90s packaging so it had the older type Ten-Tec manual, you know, color cover and actually readable. Building this was easy, and the kit's manual has some interesting info on BFOs in general, it powered up the first time and no problem, I soldered on a 9V battery holder (not included) and an antenna wire (ditto) and put it on the frequency counter (A good HP oven stabilized one) and this circuit seems to be very nice and stable, probably more so than most of the radios it will be used with. Fine business there BUT..... I then decided to look at the waveform on the 'scope. No, not a junk scope, a Tek 2465A. The waveform is........ interesting. Imagine on each cycle, first a half of a sine, then a sharp drop downward, then a square wave! Weird!! This probably works great but it can be a source of harmonics due to the harmonic content of the complex waveform described. It puts out a decent amount of voltage so you can always put the output through a 455kHz IF can or 455 kHz filter to clean it up if you like.

It's really hard to go wrong for $10, in my experience the kit will work OK on first power up, and while the output's not pure it's not going to cause trouble in your neighborhood due to the overall QRPp power level. It should work great for that old non-BFO shortwave radio.
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