I am a former Ham Radio fanatic during the eighties and nineties with the following callsigns : F5NPV , FR4FP and FM5GG but due to time consuming activities i was obliged to freeze this hobby . Nowadays i have more spare time and able to come back on the Air .
As a former Radioman in the navy i am a mostly a CW operator but using also SSB, FT8 and many other digital modes.
I am currently living in Brunei Darussalam for next 3 to 4 years with the following call sign: V85NPV
My Vidéo channel : https://www.youtube.com/channel/UC0brsj0nU_QCcmyuGocxLLA
My Easyeda channel : https://easyeda.com/F5NPV
My realtime logbook : https://v85npv.000webhostapp.com/V85NPV.htm
The many facets of amateur radio attract practitioners with a wide range of interests. Many amateurs begin with a fascination of radio communication and then combine other personal interests to make pursuit of the hobby rewarding. Some of the focal areas amateurs pursue include radio contesting, radio propagation study, public service communication, technical experimentation, and computer networking.
This website is dedicated to Home brewers which is the essence of Amateur Radio activity and hobby.
Homebrewing is not an activity from the past
« Service de radiocommunication ayant pour objet l’instruction individuelle, l’intercommunication et les études techniques, effectué par des amateurs, c’est-à-dire par des personnes dûment autorisées, s’intéressant à la technique de la radioélectricité à titre uniquement personnel ,Experimental et sans intérêt pécuniaire »
My Shack and antennae are about 80% Homebrew or Homebuild with a mix of old and modern technology.
It is all about AMATEUR RADIO guys !
In few words , this website is not dedicated to commercial products!
Du travail de Pro, UFB, bravo. 73 Bruno F5JYD
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Merci Bruno , j’ai toujours des projets plein la tete malheureusement les journées ne font que 24 heures HI …….
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Love your mods on your ubtix.Do you have a doc file or pdf file showing all the mods ? I would love to see what all the controls you installed on your ubitx. I have an ubitx v6.2
thanks for reading,
73
David
ac9xh
ac9xh@juno.com
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Hello David
unfortunately no since the UBITX implementation was mostly a day to day process with continuous improvement and mods. There all the mods i mention i put a links to google group or KD6CEC webpage where the mods are well described.
73s Didier
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A former Navy radio operator? Wow, how envious you make me. How fascinating, This is the essence of radio. Unfortunately, I never learned it and now it’s out of time. I’m very happy to have been able to connect you to SSB today for the first time. Thank you and congratulations for the beautiful EQSL.
IU2PHB Guido 73
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Hi Didier. Terry VK5TM sent me the item regarding the Power FET 30/40W Pa. At present I am building a Top band AM transceiver……. and Terry and myself are mainly concerned with this. However I am considering a higher power PA and I have built two kits from China of the FET PA’s….. one was 20W and the other 150W.
The 150W is for my Tri band SSB transceiver and seems to work ok.
However if I build your final version of the Fet PA……. I do not have the details of the Ferrite components, such as dimensions. They are not mentioned in the article. I wonder if you can send me the details.
The great thing about Amateur radio is the comradeship and willingness to help others. If you are interested in my Topband AM transceiver… which is still in development, I will willingly send you data.
King regards
Wendy G8BZY
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Hello Wendy , Regarding ther transformer they are coming from the kit and did not make any measurement on it . I will say the are probably 43 type transformer . According your need the best is to use a BN 43-202 Transformer with little metal tube to achieve a 1:3 . I did some test with different ratio (1:2 and 1:4) but the 1:3 remains the best . initially i had some issue controlling properly the avalanche effect (Thermal runaway) with this kind of MOSFET since they are not really suitable for HF use but with a current limiting system (https://www.ebay.fr/itm/DC-CC-CV-Buck-Converter-Step-down-Power-Supply-Module-300W-20A-6-40V-to-1-2-36V-/172718963804) and the current bias control using 1N4148 diodes is providing a totalling different and reliable amplifier. I am using this little amplifier with my SDR TRX and UBITX with only 0.5 w driving for about 20w output . It is more than enough to drive my tube amplifier. If you have some issue to find the ferrite transformer just drop me an email and i will send a pair for your attention (didier.jarillot@gmail.com)
73s Didier
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F5NPV mle vrai esprit om. Bravo pour ce site. 73’s F5SSL
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Merci, j’adore bricoler et effectivement tout ce que je peux construire qui soit dans mes compétences je le fais . il y a des echecs mais également beaucoup de joie et satisfaction quand cela fonctionne. Bref du radioamateurisme !
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Salut Sebastien , merci pour les essais micro et effectivement les reglages de l’equalizeur sont incroyables. L’audio est vraiment de meilleur qualité . Auparavant effectivement s’etait vraiment tout plat .
73s Qro Didier
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bonjour Didier .J’ai construit un BITX40 avec un ampli mosfet qui fonctionne bien.J’ai voulu faire evoluer l’affichage arduino .Ayant cloné le vfo j’ai reprogrammé l’affichage avec un afficheur 4 lignes .L’arduino nano s’avére trop court .j’ai essyé d’afficher avec un tft 2’8″ mais je me suis planté sur l’achat.j’ai vu que vous aviez realisé cet affichage sur votre UBITX.Le modéle de l’OM est 1938 et je suis a mon troisieme RTX ommade.Je suis maintenat dépassé par la technique.Pourriez vous m’aider a réaliser le vfo TFT que j’ai vu sur votre site.73s amities Bernard F6HGB ex F1FSJ
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Salut Bernard, malheureusement je ne connais pas du tout le BITX40 qui est trés different comparé au BITX V4 ou V5. J’ai regardé sur Internet et je n’ai pas trouvé grand chose concernant cette modification
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Ce que je voudrais c’est trouver le vfo en kit .je crois que plusieurs OM l’ànt fait .Alors CQ CQ CQ ???
Merci pour votre treponse.F6HGB
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Bonjour Didier
je te félicite ,de ce que tu apporte à notre passion,as tu un blog en Francais ,juste pour information?
73
F4ENC
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Bonjour,
Merci, mais malheureusement non je n’ai qu’un blog en langue Anglaise. Normalement les traducteurs fonctionnent plutot pas mal.
73s Didier
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Salut Didier,
Great picture on CW versus FT8. CW is for men. I hope to work you on 20/15/12m CW soon.
73 de Wolf, IN3TWX
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Didier
Est-il possible de corriger mon indicatif qui est VE2QRA et non VE2QAA? Merci ! QSO sur 30m cw le 10 Octobre, 21:40 UTC.
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Bonjour,
Desole pour l’erreur je corrige de suite
73s Didier
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Merci! Je n’avais qu’un dipôle à 10 m et 300 watts! Bravo à vous!
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Bonjour Guy , par ici 100w avec un TRX , antenne (EFHW) et ampli (a tubes) sont 100% homemade . Il y a avait un peu de QSB et surtout du QRM local en phonie .
Bonne journée et au plaisir de te contacter de nouveau.
73s QRO Didier
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Bonjour Didier,
Merci pour 15m CW QSO!
Was wondering what kind of antenna you have been using? Nice signal.
Greetings from Cyprus!
A bientôt!
Valdas 5B4AOF
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Hello Valdas,
Thanks for the QSO , i am using a random long Wire antenna 30m long with a 1:9 transformer about 12 meters above the ground. All equipements TRX, Antenna, 100w tube amplifier are homemade.
Your signal was really good from 56 up 58 with QSB and just before you i manage to contact 2 stations from Finland with also a great signal.
CUAGN very soon Valdas and take care
73s Didier / V85NPV
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Salu Didier!
Merci beaucoup pour mon 1er V8 sur 28 Mc !
Bonne chance et meilleurs 73
Fritz DL4FDM (HB9CSA)
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Hello Fritz,
Yesterday the propagation was really good on 10m . Hope to contact very soon on other bands
73s Didier
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Hi Didier,
Thanks for your great activity there … i’m looking for a QSO with you on 12m … i really hope to catch you soon on that bands ( i heard you several times on both CW and FT8 but never been able to break the pile up ).
73s and Ciao
Marco
IK0YVV
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Herllo Marco,
Do not worry i am here in Brunei for few more years and i am sure we will be able to make.
73s Didier
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Greetings from North Sulawesi! I have bookmarked your blog for some time now, making it my go-to references on bitx, usdx, end feds, since I’m into homebrew myself. Thank you for such a deep, yet clear explanations on each article. Now, to my surprise, today I found your eqsl card of our contact on 80m in my eqsl.cc inbox! Thank you! -Greenhill Weol – YD8RYX-
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Hello,
Thanks a lot for your kind words and not easy to populate all information in a web page since the UBITX was a continuous development . For the USDX , i have stopped all development and it was mostly an experiment , by far i prefer the LMR SDR. Unfortunately i am not so active on 80m since i have some spurious from city lighting system .
Hope to contact you on other bands
73s Didier
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Thanks for replying, yes 80m is hard for me also, I use a very compromised vertical fishpole antenna (only 9 meters) with loading coil. But if you did not mind, I’d like to ask, did we have genuine QSO on 80m or did I log a fake posing as you? Since I have your eqsl confirmation card, but not on LoTW. -Greenhill Weol – YD8RYX
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Hello,
i just check on my log but cannot find any QSO with you
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Hello V85NPV:
The BD4IGH/QRP I contacted you a few days ago wanted to contact you through his email. I found out in qrz that BD4IGH’s email is also very fond of DIY BUITX and Usdx. He couldn’t reach you and I will convey it to you
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Hello,
Always very happy when i can contact QRP . The USDX is interesting but very limited regarding SSB mode . My UBITX is almost 4 years old now and still working very well . Hope to CUAGN very soon 73s Didier
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Hi Dear Didier
I live in Russia and I like to listen to short wave
I heard you today 26.04.2023
Communication with_DJ4MX_JA9CHI_DL7HU at 21:39/21:47UTC on 14002.6 MHz CW RST549/559
Please send me your eQSL
Thank you in advance!
Evgeny UA3123SWL 73 & 55
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Hello Evgeny
Many thanks for your report . QSL send to your email adress but also i have updated LOTW , QSL.cc, cLUBLOG and QRZ.COM
Best 73s Didier
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Bonjour Didier,
Merci de ce qso 28.008 en CW. Vous étiez 529 qsb 19/05/23 09:38
Bravo pour les TX etc … “Maisons” !
Rig ici ic 7410/80 W antenne 4 elt cubical quad OM
73’s Bruno dept 38 Isère
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Salut Bruno,
Toujours content de contacter des OM Francais. Ton signal etait vraiment bon avec juste un leger QSB. Je ne suis pas trop actif sur 10m car malheureusement j’habite dans une cuvette entoure de collines et sur 10m le rendement de mon antenne n’est pas au mieux (disons que les ondes ont un peu de mal sur 10m pour sortir de ma cuvette hahahahahahahaha !!). De ce fait je ne peux pas vraiment installer de beam au fond de ma cuvette (J’ai fait un essai avec 2 beam que j’ai installe sans vraiment y croire et malheureusement le resultat n’etait vraiment pas terrible) .
Je suis ici pour le boulot pour encore 3 ou 4 ans et je pense que nous aurons l’occasion de nous contacter a nouveau.
Pour notre QSO j’utilisais un TRX analogique en emission et SDR pour sa chaine reception (Je sais je fais les choses un peu a contre-courant hahahahaha ) , antenne Long fil et je poussais avec environ 200w dans un petit ampli a tube. Rien d’extraordinaire mais bon ca fonctionne pas trop mal.
73s Qro Didier
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Bjr Didier, merci pour le très bon QSO de ce soir, félicitation pour le matériels maison, au plaisir de te retrouver, cordiales 73’s JP F8DZU
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Salut Jean-Pierre
Toujours super content de contacter des stations FR
73s QRO Didier
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Bonsoir Didier, merci pour le qso en 17M. trés beau signal ic à Nancy, c’est un new one pour moi. Ici, K3 et Gap Eagle pour le 17M. Au plaisr de se recontacter sur d’autres bandes/modes
73, F5TSB
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Bonjour Denis,
De beaux signaux venant d’Europe . Je vais installer une W8JK et je dois faire des essais durant le Week End. En tout cas ton antenne GAP TITAN fonctionne vraiment bien car tu arrivais dans les mêmes conditions que des OMS utilisant des beams. Par contre de mon cote je n’utilise pas trop le split n’etant pas en mode expedition j’avoue que ca me saoule de devoir jouer du VFO hahahahahahaha !!!!
Pendant notre QSO , j’étais avec 350w , Antenne Long fil et petit TRX SDR.
Au plaisir de te contacter a nouveau
73s QRO Didier
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Hello Didier! Thank you do much for your QSL. It is amazing! Wish you have much blessings!!
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