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<sigh> This reply is another reason I rarely post.? But thank you for your implication.? I was simply offering my opinion.? I now regret doing so. 73, Russ Hines WB8ZCC -- Reply to: russ@...

Hi Jerry, Yes you are right, some sound okay and others don't. At the cheap price of Electret elements, I order some from several different sources and just solder in one at a time and listen to

Increasing the caps as Farhan pointed out elsewhere would fine but then you should adjust the BFO to put the signals in the passband.? That mod however makes SSB really poor both RX and TX. While

Though many report good performance from the mike element that comes with the kit. At around $0.10 each, it's possible the quality might vary a bit between units and between manufacturers. Jerry

"address the microphone audio" Not sure what there is to address about the mic audio. I have built 5 BitXs including the uBitx and I get good audio reports on all of them, of course I'm using the

?I don't know if y'all have already done that....but writing up a little "white paper"" and putting it on the web site about little bite-size improvement steps like going to the RD16HHF1 for example,

Receiver performance has many dimensions. ?Sensitivity ?Bandwidth ?Overload performance and dynamic range. ?Stability, Especially important in the days of VFOs. ?Spurious signals, birdies and

Allison,?? Please don't get offended as this is just my 2 cents worth. Of your list, only RFParts has the?RD16HHF1. Ordering 4 for $19.00 and a dollars worth of something else to meet the $20.00

Also, keep in mind that if you plan to move from the IRF510 to the RD16HHF1,? the uBitx final should have some adjustments to the transformer ratios and such. The RD16HHF1 is not quite a drop in

Going to 150ma should be fine, so long as those IRF510 tabs are not getting so hot that it's uncomfortable to keep your finger on it. But those bias pots are very touchy once you get into the active

Kees, Please put me down for two each of the Click Fix and AGC boards. Also interested in the SWR boards when they are available. 73, Kevin KB3OMM

On Sun, May 13, 2018 at 6:11 AM, <davesters@...> wrote: > ve7cws, > What would you change about the mic? Almost every one I have talked to on > the radio, says that it has a good sounding

Allison has quite a few posts here. None have discouraged experimentation with the IRF510's. Quite the contrary. She did however suggest you get your RF parts from reliable vendors, be they IRF510's

THe only place I buy RF transistors from is RFparts, Digikey, Mouser, Kitsandparts, and Jameco. When it comes to oddball or scarce parts its RFParts as they do stand behind theirs,?? RD16HHF there

There's a thread on the B40's sensitivity here. Signals were heard down to -130dbm and the results were verified. /g/BITX20/topic/5447469#30094 Vince. -- Michigan VHF Corp.

Gents and ladies, I don't post much as I'm a busy broadcast engineer.? But I try to read often. Allison's post contains wisdom. Education tends to be expensive.? If your goal is IRF R&D, then knock

Yes this was a popular way of varying the bandwidth of filters in its time. Varying the capacitance of the diodes via voltage to vary the roll-off frequency/sharpness of the filters. Quite simple to

Hi this an interesting read. https://www.google.com.au/search?q=Polida2008&rlz=1C1CHBD_en-GBAU782AU782&oq=Polida2008&aqs=chrome..69i57j0j69i60l2.1870j0j8&sourceid=chrome&ie=UTF-8? Cheers Kevin VK2KTG

Hi Jerry, What do you mean by "Be very careful about setting those pots to "a lot more" than 100ma,? that's a good way to make the IRF510's pop from the heat." What's? a lot more? I found I needed