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Hi Jim ,Thanks for replying. I'm running off a Biono battery (about 13.3 volts) but the transistors are specked for 25v and sample circuits show 15v.? I agree about cheap parts, so I 'll test when

No, I did get them from e-bay and no I didnt test them.? I ordered J310s from ebay also, but I will test themThanks for replyingAndy? Km4TRT

It doesn't say to remove the 1/4-20 bolt for ALL of the inductors, but you should.? The bolt is only a form to wind the inductors on.

I haven't built that particular oscillator but I have designed MPF102 and J310 oscillators operating from 100 MHz to above 500 MHz.? (Mine didn't use quartz crystals, mostly they used LC, microstrip,

On your first tries, did you get semiconductors from Tier 1 vendors, or off of eBay? On any case, did you test them first? 73 Jim N6OTQ Sent from my quenched-gap spark transmitter.

Hi, Trying to get a JFet oscillator to work.? I'm using Ashar Farhans schematic for his spectrum analyzer.? (100 mhz 2nd Oscillator) So far I've built two boards and burned out Q1 in each board even

Hi Ellis, I too am making a "specan". I have the log detector working on a separate board(using it as a sweeperino), but not far along enough in testing to put the shields on.? I left open tracks on

As much as I dislike mentioning the name ... Amazon. Many more to choose from. I ordered one batch from BoJack to experiment and test a crystal test fixture to go with my NanoVNA. All were active and

Hi Bill Got it - thanks for the explanation. The print statements?are, as you say, not used without the phase detector, so they have no effect. -- Sverre LA3ZA http://la3za.blogspot.com

BTW, the frequency comparison is actually taking place at 2.5 MHz, not the (in this case) 10 MHz, thus the factor of four to convert the frequency error count to Hz, or fractions thereof.

The print statements are not executed if the phase detector is bypassed - note the if USE_PHASE_DETECTOR. If this is set FALSE, those statements are skipped. The multiplication and division convert

I also had to comment out all the Serial.print statements in the?PPSinterrupt() procedure. Probably some critical timing issue. I have a question about the meaning of the C in the display, showing

That was it! Thanks, now it locks Sverre LA3ZA

SVERRE, Take a look at whether your gps outputs GPRMC or GNRMC to begin a valid fix. I am using a uBlox gps off Amazon. The default output from those is GNRMC, most others start with GPRMC. Search for

Thanks Bill, I downloaded the code and it identifies itself as "V.5.4 F2DC PD0EK", but still hangs on "Waiting for GPS". I'll have to look into this more tomorrow, maybe there are some subtle

Good day, Sverre, I uploaded my latest revisions, along with a jpg of the front of the unit showing the display. I am sure that this is the latest. After a restart/fresh upload,, the top line should

The following files and folders have been updated in the Files area of the [email protected] group. * /Q&D GPSDO/GPS_Si_52.ino ( /g/HBTE/files/Q&D%20GPSDO/GPS_Si_52.ino ) *By:* Bill Buoy

Thanks? Bill, But I cannot see that the date has changed from 16 February in the file area. Are you sure the upload went without problems? -- Sverre LA3ZA http://la3za.blogspot.com

Sverre: I got the clock to work using examples from previous versions of Erik's program and from examples from FD2C. Probably not the cleanest or prettiest way, as I am just learning C using this as a

take a look at the code I uploaded this afternoon. probably not the cleanest way, but I managed to cobble together Erik's code and some if the examples I got from FD2C and got it to work. I'm not