RF Amplifier Mystery Solved!

Рет қаралды 1,120

6 ай бұрын

Пікірлер: 18

@oldblokeh 5 ай бұрын

Very interesting, Nick. Incidentally, the MSA-0685 MMIC was definitely manufactured by HP (later Agilent, later still Avago, now Broadcom). Cheers, Steve.

@ptronix 5 ай бұрын

Thanks Steve, wasn't sure if hp made it or just put their part number on it. Best wishes nick

@danishnative9555 5 ай бұрын

The MSA-0685 was originally made by Avantek. Avantek was purchased by HP in 2005 for $83 million. And now, I guess they're Avago or Broadcom, and very likely tomorrow something entirely different. Certainly some here remember Avantek MMIC's pre-2000. The MGF-1302 made by Mitsubishi. There was a MGF-1402, and I think there were minor differences in NF.

@ptronix 5 ай бұрын

Thanks for that history lesson Paul. Years ago I had a nice avantek block amplifier. Got it out the scrap heap at work, only thing wrong was the integrated power supply. +20 dbm output 30 db gain 1 Mhz to 1 Ghz. I then managed to destroy it as my power supply went high voltage!

@gerl9869 5 ай бұрын

In the meantime I found the article in english, on the website of the German version of Elektuur magazine, called Elektor there. But strange enough, it is behind a membership paywall. Well , if you need certain text parts of interest to be translated in english, I can make a translation ' by hand' , if you wish. best, Ger - Amsterdam

@ptronix 5 ай бұрын

Thanks for all your help Ger, no need for the translation. I've tested it and that's it all I need to do, but having the schematic was very useful. Best wishes nick

@matambale 5 ай бұрын

Impressive performer Nick, thanks for the additional detail on the design. Perhaps it's time to get into satellite ATV? :^)

@ptronix 5 ай бұрын

Thanks for watching Joe, no chance of me doing TV on 23 cm from this location!

@matambale 5 ай бұрын

@@ptronixWell sir, if you point it skyward...(Yagi on an alt-az rotor system)....

@ptronix 5 ай бұрын

No Joe can't see that happening. I need a yagi pointed at the moon, I'm sure I'd hear some of the higher power moonbounce signals. Trouble is the moon tends to move!

@matambale 5 ай бұрын

@@ptronixI was referring to amateur radio satellites, but in either case, a dual alt-az rotor swinging that yagi about, and a satellite (or moon) tracker running it could be lots of fun. And, of course, money.

@danishnative9555 5 ай бұрын

Hi Joe. It was not Satellite L band reception use. The locals used discarded Sat recvrs as a 70Mhz FM Wideband Video IF, via a 1248Mhz hand made down-converter. Hams transmitted local FM Video. Remember the days of of the big Parabolic's in yards and free Sat TV? Encryption relished those receivers to the Goodwill shop, hence hams improvised the junk.

@petergrannell6205 5 ай бұрын

I have the English version of the article in Elektor Electronics by K Koring. I've sent it to you by e-mail.

@arenaengineering8070 5 ай бұрын

LNA for MMDS TV.

@jimdavis5230 5 ай бұрын

Good job the article wasn't written in Welsh because you couldn't translate any of it using Google or any other translation software.

@BobAndersson 5 ай бұрын

Hi Nick. The Alphabet Artificial Idiot appears to have swallowed my comment yesterday where I suggested using an online OCR to do a PDF to text transcription before using Google translate. Rather than risk giving it dessert I'll eschew the details but it works well for me when I need to translate German service manuals.

@ptronix 5 ай бұрын

Thanks Bob, the Dutch man who sent me the link to the article, offered to translate bits if I needed it. But it's a bit late now, I know what it is and what it does and for me the project is over. I've no use for it but interesting device all the same. Best wishes nick