tag:blogger.com,1999:blog-7590176649168185428.post95029153871580650..comments2024-03-28T08:01:27.111-04:00Comments on SolderSmoke Daily News: A Probable First: First Ever Radio Contact Using Unijunction Transistor as the TransmitterBill Mearahttp://www.blogger.com/profile/07662500663603350847noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-7590176649168185428.post-34418311749551366962016-02-05T23:44:59.884-05:002016-02-05T23:44:59.884-05:00Yes I still have my Gmail adress, linked to this a...Yes I still have my Gmail adress, linked to this account now. Haven't used it in ages tough.<br /><br />This is the account linked to my email-adres. Not really running anything solid-state involved right now, neither HF. Just the triodes running as a B-K oscillator, another negative resistance device :-) UHF/microwave transmitter consisting of a triode, 4 RFCs and some form of antenna. Don't get much simpler ;)<br /><br />Now gotta go,<br />Looking forward to hear from your succes with the UJT!<br />73,<br />Thomas, ON4CPTAnonymoushttps://www.blogger.com/profile/03435553340639422039noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-53817850131679630602016-02-05T08:08:45.489-05:002016-02-05T08:08:45.489-05:00I was pleased to have added five more unijunction ...I was pleased to have added five more unijunction QSOs to my logbook last evening. My best DX thus far (AA1MY/Maine) is 161km. <br /><br />Cheers,<br />Mike, AA1TJ Michael, AA1TJhttps://www.blogger.com/profile/11538000826572081873noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-38296757398510895402016-02-05T08:02:54.650-05:002016-02-05T08:02:54.650-05:00Hello Thomas,
Tnx OM. It's wonderful to hear ...Hello Thomas,<br /><br />Tnx OM. It's wonderful to hear from you! I think we have much to discuss ;-) I'll send you an email (provided you have the same Gmail account). <br /><br />73/72,<br />Mike, AA1TJ Michael, AA1TJhttps://www.blogger.com/profile/11538000826572081873noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-68240414433753188592016-02-04T12:55:45.696-05:002016-02-04T12:55:45.696-05:00Well,
I know not much about 80m propagation either...Well,<br />I know not much about 80m propagation either, but it seems like it must have been quite a localized event, that caused the peak? Since 17km away the effect was a lot less strong..?<br />Theoretically seen, aircraft doe produce reflections at such low frequencies. If you look at Chain Home, ran originally on 6 MHz...<br />Just a suggestion...<br />Never heard of any aircraft scatter at 80 meters! But, it is possible at the right angle/altitude etc it worked as a reflector...ON4CPTnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-65427411302286460162016-02-04T11:40:50.299-05:002016-02-04T11:40:50.299-05:00Ow by the way, what type of UJT are you using? And...Ow by the way, what type of UJT are you using? And got any idea on the waveform?<br />Yes a lot of questions, but this caught my fascination!ON4CPTnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-75726111408230089812016-02-04T11:32:47.763-05:002016-02-04T11:32:47.763-05:00Damn it, you pulled it off before me!
I never got ...Damn it, you pulled it off before me!<br />I never got the output of the UJT with 160m crystal without a lot of noise...<br />Gave up on it a long time ago, after you sent a PCT :-) Didn't have my ticket back than, the worst part I've got it over 2 years now... And didn't make a single QSO yet. Besides messing around point-point with B-K oscillators on 70 and 13cm. A 1-triode, 2-transistor 13cm band RX running on 9V! Or pentodes used as klystrons, very easy to do.<br /><br />But how did you do it?<br />You got any schematic?<br />By coincidence I was looking at the UJT again, thinking about how to make a electronic PCT-equivalent.<br />But quickly dropped it for the an Enhacement Mode MOSFET, with the Gate made very leaky with resistors.<br /><br />Congrats!<br />73,<br />ON4CPT/ThomasON4CPTnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-60037631213919682812016-02-04T09:55:41.720-05:002016-02-04T09:55:41.720-05:00Oops, the above post was by AA1TJOops, the above post was by AA1TJAA1TJhttps://www.blogger.com/profile/10232621616867208158noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-68689222527167869942016-02-04T09:54:16.859-05:002016-02-04T09:54:16.859-05:00K1SWL reports that my (95km distant) signal climbe...K1SWL reports that my (95km distant) signal climbed out of the noise to peak at S-9 for a period lasting several seconds, after which it fell back into the noise. W1PID (112km) witnessed the same event, but with a less dramatic peak signal level. I'm admit to knowing little-to-nothing about 80m propagation. Meteor trail reflection? Hovering alien Mothership? ...although I allow there may be a more mundane explanation for this dramatic, sudden path enhancement. Ideas?AA1TJhttps://www.blogger.com/profile/10232621616867208158noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-16841366640546493032016-02-04T08:18:52.357-05:002016-02-04T08:18:52.357-05:00This comment has been removed by the author.rbarnichhttps://www.blogger.com/profile/01203561128390143863noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-54024247630083955522016-02-04T08:18:00.392-05:002016-02-04T08:18:00.392-05:00Now you know how Marconi felt!
Great story.Now you know how Marconi felt!<br />Great story.rbarnichhttps://www.blogger.com/profile/01203561128390143863noreply@blogger.com