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Well, I feel, and I believe people have done this successfully, that a dynamic microphone can be used if the correct amplification, pre-emphasis , and whatever other factors are dealt with. The uBITX

Hi Glenn, Do the 2n5109s need heatsinks? Do they get hot? I have ordered some to experiment with. Wondering if I need heatsinks for them. Thanks Marco - KG5PRT

I've purchased the AGC from?Amateurradiokits.in and wondered if any one else has used it in their Ubitx? (not bitx20 or 40) Has it worked to provide AGC?? -- John NQ3RP

Hi Kees, I have multiple values bypassing under the PCB itself. The board was laid out to accept RD16HHF1's or similar also.? But since they cost around $8 each here the IRF510's stayed!? Too

I think it would be better a 8ohm speaker. I am not a fan of using a resistor is series with the speaker, although you can do that. If you have a spare TDA or it is easy to get one you can go on using

sorry like i said before. ive seen alot of rebuild posts for this rig. why dont everyone just rebuild it if you all think its so bad.ive read so many other hams posts that are using it and are

Hi Allison, My experience with PA's is almost non existent but I decided to build one per your mods. It was not built to criticise your Wiki information.? It was built with parts to hand and the

The uBitx needs an electret mic,dynamic mics will in the main give insufficient output. The supplied electret can be used of course but you can get better ones and may want to try one of the tint

Hey Raj, I see the dynamic mic mod came from you. Do you suggest this over modding a dynamic mic like the yaesu mh-31 with the supplied electic mic?? I’m on the fence. ?I don’t mind replacing

no this wasnt humor. i was just posting on this fourm to shed some light on the follies of commercial rigs versus this one.also i was passing on my suggestions. ? Sent from Yahoo Mail. Get the app

I didn’t catch this message. Well hopefully I’ll be doing enough with this project that I can consider I built it. ;). I do have a RF probe but the max wattage it measures is low. I’d have to do

On Wed, Sep 19, 2018 at 12:53 PM, <kg9rb@...> wrote: bc547 Similar to 2n2222A, of if a Fiat 500 is similar to a F350 flatbed. The max collector current is 100MA, HFE at 2M is nice but not likely

Schematics for the modded kits and parts amp....... Some notes: It was awkward to do the BD139 to IRF510 mod due to mechanics of the board. It ends up the at the face down IRF510s are manageable if

I found this speak so far, but I would like a higher wattage one. https://www.amazon.com/Adafruit-Speaker-Diameter-Watt-ADA1313 If anyone know of something in the size of 3” please share. Joe Kd2nfc

has anyone tried bc547 ? similar to 2n2222? just a suggestion when i build or modify any rf circuits i match the transistors . might have to go thru a bag of em but the end results are worth it.

David KG9RB The continuous run-on text was difficult, if not impossible, to read without any breaks. It if was an attempt at humor, it did not come across as humorous. You still did not tell us if

arv, if you are referring to me, yes? my enter key is ignored.i know what i stated might be a bad taste to some but its not offensive. im just stating facts about a great little radio kit with some

Here is a question...? Did I every say the 2n2222A would get you flat to 30mhz? I did say it was the best bang for he buck for those doing 80 through 20. Why? Because it will not.? Its a lot better

Thanks Curt, I’ll look for a 8ohm speaker. Joe KD2NFC

Please place me on list for board purchase when available. Thanks. Mel.