Just checked the datasheet (I use such a module as driver) and indeed .. no reference is given concerning DC coupling, that is . . . sloppy.
Anyway, in my design (an old UMTS/3G pallet) there are caps (take 56 - 100p or so)
Posts by PA3FYM
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Perhaps I will write it down, but it has to do with the ETSI standard concerning what we now call WiFi (then called 'radiolan') and how 'we' obtained +20 dBm output/EIRP (whatever) power (at 2.4 GHz) (draft recommendations were far less output)
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Congrats. In The Netherlands we have a saying, which (freely) translates to)\:
"When there is one sheep across the dam, more will follow" -
SV1BDS Rgr that / QSL ; -)
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: -)
In fact, there is a whole story behind this article, *why* I published it (also in respect to the time frame then) , perhaps something for in my memoires ; -)
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ON6HN Nice vintage setup! Did you change the LO freq from 2176 to 2256 MHz?
Btw to maintain vintage, I suggest a (Pinsch) cavity with 2C39 ; -) -
It seems that TA gives no permission to the amateur satellite service between 2400 - 2450 MHz.
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This article I published around 20 years ago.
Don't have it anymore (because the server -at that time- doesn't exist anymore) but somebody saved it for later use.
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DB8TF .. So what ? WFWL (Work First Worry Later ; -)
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Didn't want to start a new topic/thread, so I post it here.
Repaired/refurbished/aligned/<whatever> my old FT-780R a few weeks ago to serve as portable QO-100 transceiver ('Nachsetzer'). To determine if all the alignment worked out, I used my (almost forgotten) electronic guitar tuner while listening to the CW beacon ; -) 432.549.12 MHz (USB) delivers a 880 Hz (A5) tone! (click on image to enlarge)
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OH1NHW Use sandpaper to get rid of the surplus 0.2mm
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Of course not, no relays! And of course not TX enable to GND!
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that looks really good ! Please think of a PTT input to switch off the quiescent current during RX.
Kurt, naturally we thought of that, see tin can, bottom left side, transit capacitor.
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Friday is my free day, so time to hobby! As guinea pig #2 built the 'Radioclub 't Gooi' (PI4RCG) MMIC amplifier however, deviated a little from the original design (didn't had all the parts, so the junkbox is always my best friend ; -) and used two TQP3M9009's as driver MMIC's (original design uses two SBB3089z's). My MMICs have more gain and hopefully all will be stable! Amp has to be tested of course.
Below a pic of WIP (Work In Progress) (click to enlarge)
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No idea, I (only) use the cheapest Chinese LNB's (ca. U$ 3,-), modify them (for GPS lock) and make QSO's ; -) George ... we made QSO's (two times) and your photons (not really . . they were relayed through the transponder ... but anyway) entered my 3 U$ LNB and 1) I could hear you and .. 2) rock stable ; -)
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DD4YR That's the way to go .. pegging needle in the right corner! : -)
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DD4YR What kind of Bird slug is that? It looks full scale but you say 60W out?
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Assumed to be power at the antenna feed point. (?)In The Netherlands it's measured at the output connector of the transmitter/amplifier.
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Netherlands: 2400 - 2450 MHz 120W output, no further regulations other than that you must have a Full license and cause no harmful interference to other users.
