开云体育

Ron I think it is possible to make a CW transceiver, not just transmitter! There are op-amps which make audio amplification and filtering easy. Plenty of transistors for an audio amp. But the

Hi Alex I don't know of any problems, and I have just tried to download with no difficulty. But I have noticed that sometimes on the internet, if I click on a .pdf file it opens Acrobat but the

Hallo Hans, some time ago I saw on this reflector about your website (I just had known!) and a great QRP Book on SSB and QRP techs; I tried to download all chapters but I still have some difficulties

Nice picts Hans, Sure it is possible to make a CW tx with your retained monitor parts. I saw voltage regualtors, an IRF MOSFET, splendid for a several watts pa stage and some nice 74hct... ic's. Good

Ok, last off topic post from me on this subject... I completed the dismantling of the monitor and posted the pictures on my web page at http://www.hanssummers.com/misc/recycling/monitor/index.htm .

Tuning around on my 40 metre version I heard the following : "The personal this way, here, there, would be Bill *, there." * Name changed to protect the guilty. Is there a filter I can use to

Hi Ruud, First of all; hartelijk dank voor alle info, leuk om ham uit PA-land hier te ontmoeten! I really appreciate the good information you provided. Had a quick look at your interface drawings

Hi Ron, Although al bit late I may have some suggestions for PSK. I also build a BITX20 for PSK. Last weekend I completed the interface from the TRCV to the soundcard. The schema is uploaded as a

P.S. For those who don't get attached pictures, they're also in the group photos http://photos.groups.yahoo.com/group/BITX20/lst under G0UPL/recycle 73 Hans

Latest news, following Paolo's influence: I have commenced dismantling of the previously mentioned 19-inch DELL monitor, which the IT department failed to remove from the cupboard next to my desk

Is it possible for someone to post a picture of the FAR BITX PCB ? Or is there a website that shows it ? I would like to see what it looks like before ordering one. Thanks, Steve K1EL

Hi agn! I just added circuits of the LA4185 audio amplifier and ( intend to build) pa0ksb huff & puff to the Photo directory. Audio amp is working fine now. Still waiting for the huff&puff

Paolo I just uploaded a corrected file. Sorry about the confusion. That error came from my use of a then new CAD program, not from anything on K8IQY's web page, so it was my

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 : /MODIFICATIONS/RIT-K8IQY.png Uploaded by :

Hi (Arv) While browsing through the files repository for BITX20 I found a mistake in "K8IQY RIT Circuit.png" at http://groups.yahoo.com/group/BITX20/files/MODIFICATIONS/ D2 and D3 are zeners, which

Hello fellow homebrewers, While waiting for the huff and puff components, i decided to finsih the LF amplifier. Instead of the LM386, I found an LA4185 in my junkbox from an old demolished transistor

Jim, We used to make non inductive resistors specially for some clients in the '80's. In general purpose carbon or metal film resistors, the body is spiral cut at least 60% of the body

Where I work, we have a problem w/ some fiber optic transceivers so we're hand-testing parts for one customer to provide parts that work just for them, and binning the rest by performance numbers. I

Jim, Nope, I was in the resistor manufacturing field. I was managing a factory some years ago.. from the time the resistive element is put on to the end of painting the value on it.. the

A wonderful idea! I suspect that if you wired the resistors in parallel on a 50-ohm stripline PC board with the connectors X-ed on opposite sides of the board, you could cancel out a lot of the