Got an old (or very new) AM only shortwave radio with no CW-SSB capability? If you want to enjoy casual CW-SSB reception, this varactor-tuned 455 kHz oscillator may be built into larger receivers or else mounted in its own case and placed near your portable SWL radio. The on board tuning control compensates for alignment variations from one receiver to another in addition to permitting fine-tuning of SSB/CW signals. Operates on 6 to 15 VDC. We recommend (undrilled, no holes) enclosure TPx-13 for this item.
Posted by Mike on 18th Apr 2012
I built my little BFO kit over two nights, and was quite impressed with how it worked once it was tuned in. But I also had the same issue with the kit that reviewer Greg did, i.e., every time I retuned my radio, I had to get the twiddle stick out and retune the IF coil. Other than that criticism, I have to say it was a nice little BFO. But, I would have appreciated knowing from the sales copy that I'd need to retune the IF a lot. I am really hoping that Ten-Tec will redesign the BFO kit so it will be either much easier to retune (perhaps include an external IF adjust control) or else much less necessary to retune it (by some basic redesigning of the kit perhaps). For a first kit, I was very happy that it worked at all however.
Posted by Dave on 20th Mar 2012
I built mine in about an hour and was using on my small portable Grundig. The Grundig has a built in BFO but this one works much better. I like how you can either install it into the radio or leave it external. I'm really glad I purchased this.
Posted by Greg on 31st Jan 2012
Fun and easy kit. Works well, but for some reason, mine requires retuning of an interior coil, every time I change frequency- on the same band ! I could understand when this is required when using it between different radios ( with different I.F's etc). But for some reason, the SSB/BFO "tuning" dial on the kit will not tune in an SSB station unless the interior I.F. frequency adjustment is used. Only then does the users tune dial work for adjustment. But move the radios dial a few KC's and the coil has to be retuned.
I don't know if this is a design flaw- it should not be. I have checked my potting and
construction and all looks OK.
I.F. coil adjustment should only be required when changing radios. I don't know why my does this. Otherwise, it works well, has good stability and has tuned in CW and SSB signals on everything from a cheap pocket SW radio to.