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--- In BITX20@..., Arv Evans <arvevans@e...> wrote: a feedback path can be established > from Mike to Mike Amp to Rx AF preamp to LM386 to Speaker...and back to > the mike again. > >

Sorry! Group pages not available here currently. Unable to post the new version of PCB. Will do so as soon as they become available here. 73 Rahul VU3WJM --------------------------------- Do

Hi! A pack of 500 with me too just in case. Got some surplus (100+) prewounded Balun transformers imported ,Japanese. Just for the core alone. Possibly of slightly better core quality than the

Sure - it's following via private email. Hans http://www.HansSummers.com

There was mention that Farhan was going to make a quantity of the binocular cores available to the list. Has anything come of this ?. I'm just about to start construction of the BITX20, hardest part

the cores are still with me. time to move my bottom and call up a courier service to send it off to hans. hans, can you mail me ur address? - farhan

John The decoupling cap on pin-6 of the LM386 would probably not be the culprit causing a short oscillation during the change over from Tx to Rx, as originally described. Take a good look at the

Thanks Chris, Arv and Ashhar for comments and advice re the squeak. I have checked and the relevant diode is in place. I removed the decoupling electrolytic cap. from pin 6 of the LM386.

Felipe Do you now have a working BITX20 operating on SSB mode? My suggestion is that you complete and test the SSB version of a BITX20 first. Then we will work on what you need to do to add CW

Farhan We already have a zener diode varactor in the VFO, to provide fine tuning. It's action isn't very linear: the fine tuning control has much more effect at one end of the VFO range than the

John & Chris I just took a good look at the schematic, and it seems that the Mike amp's 50 MFD decoupling capacitor (the one connected to 12 V via a 220 ohm resistor) may be storing enough voltage to

Guys, i was travelling the whole of two weeks. living with a thinkpad and two changes of cloths give u a lot of perspective on homebrewing. there are a number of very interesting issues that have

I too have the same problem, maybe worse because I'm using a VOX driving my switchover relays and it affects the VOX setting. My fix for the symptom was to add a relay and switch the speaker lead

Hi, I have the same experience. I thought it has someting to do with the way I switch over, three wires with clamps between the circuit and a switch, but it seems that it is a timing problem? So now

Progress at this end is slower than hoped but the rx is now working very well. Two minor points. 1. The middle section of the band pass filter needed a bit more reactance. An extra 10pf across the

Dear Ted, Hi! I may not go in for direct manufacture or sale of these boards. Plan to hand over the final artwork to VUQRP group for distribution. It may be availble but at a later date. I have

This sounds interesting. Have you thought of taking orders? Ted N3Ted 8/23/04 9:48:51 PM, Rahul Srivastava <vu3wjm@...> wrote:

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20 group. File : /BITX 20 V1 /btxv1.pdf Uploaded by : vu3wjm

OT: MESSAGE FOR ARV EVANS: Sorry to all the group for this message, I am trying to communicate with Arv K7HKL but I am failing to do so via ordinary email. Arv, I think that when I created the

Little progress here. My BITX20 is essentially complete (see my photos under G0UPL directory) and awaits debugging and alignment. I have very little spare time, and too many other projects going on