Hi, my 10 MHz reference oscillator waiting for the OCXO to arrive from eBay for the Lars GPSDO. (shield is removed for the photo)
MY QO100 SETUP
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Rgr, did you order the Bliley OCXO (U$ 11.99) ?
Yes, thats what I expect !!! This will be the portable Lars GPSDO ?
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Yes, thats what I expect !!! This will be the portable Lars GPSDO ?
I don't know why you ordered it? ; -)
I ordered a 2nd for my 3rd, being a 'minimalistic', QO-100 transverter.
The idea/setup is utterly simple, however needs POC (Proof Of Concept) here.
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Hi, in order to measure a 0-1.2V power detector output from final amplifier, a 0-20 mA circuit is designed using existing +12V and GND lines and one 20 mA line that is going to drive a voltmeter at *5 range (0-6V). I plan to use a non rail to rail dual opamp. It is based on this circuit. It is also need proof of consept...
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Before you start building etc, are you planning to read out that power detecter with an Arduino (later) ?
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Before you start building etc, are you planning to read out that power detecter with an Arduino (later) ?
SV1EED proposed to write the required software but I say for fun to try my circuit ...
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Ah, ok. When selecting the internal reference in the Arduino (or other Atmel chip) the 10-bit range is squeezed into 1.1V so power could be read (and linearized/processed in the software) with the ADC.
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Ah, ok. When selecting the internal reference in the Arduino (or other Atmel chip) the 10-bit range is squeezed into 1.1V so power could be read (and linearized/processed in the software) with the ADC.
TNX I am familiar with Atmel. With SV1EED we have done the AD8302 and read voltages.
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Hi, transmit control box, no more aligator clips ...
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Hi, in order to measure a 0-1.2V power detector output from final amplifier, a 0-20 mA circuit is designed using existing +12V and GND lines and one 20 mA line that is going to drive a voltmeter at *5 range (0-6V). I plan to use a non rail to rail dual opamp. It is based on this circuit. It is also need proof of consept...
It finished, an 220 Kohm and a decoupling capacitor added to the input not showing in the picture.
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Hi, has anyone open the AMSTRAD F101 LNB ? It have a 25 MHz or 27 MHz xtal ? It has wobbling or similar problems ?
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Hi, does anyone knows the AMIKO L108 to which exactly Octagon is similar ?
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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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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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Hello Remco, if you find an FT-780R old, what about my uplink station hi ?
- IC202S (1978)
- homemade upconverter (UHF unterlage 1983)
- Amplifier from Bulgaria (new)
- homemade dish 1.7 m (1988)
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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 ; -)Yes, i changed the X-tal to a 94 MHz instead the 90.6667 MHz.