I have several Isotemp 10 MHz OCXO's that I am using for all bands from 902 through 76032 MHz. None are GPS disciplined. I calibrate them against a rubidium standard every month. So far they have done

Hi Hugh, It appears the schematic has it labeled "7805/switcher" so I would think it would be fine. The 7805 in the TO220 case is rated at 1 amp, and I can't imagine the circuit drawing anywhere near

Hi Tim, Can you put me down for one fully assembled board? That's all. 73, Zack W9SZ On Mon, Aug 10, 2020 at 2:10 AM Tim - VK2XAX <VK2XAX@...> wrote: Hi all, I'd like to formally call for name

I have a couple questions about wiring this thing up. Does the "A/B" lead go to one of the pins on the rotary switch, the one that goes to pin 9 on the 16LF877? And can the circuit for the LED supply

These are supposed to be the best converters on the market. I have the Ultimate. So far, it has exceeded my expectations. Since they use an FTDI chip, it should work with FT_PROG. http://www.usconvert

Hi Tim, I think the countersunk screws you are referring to are the same thing as what are referred to as flat head screws in the USA. All the flat head screws I know of are countersunk. I think the l

No reason why not with the conical horn. Wit the Chaparral feed, you have to initially be able to get at the set screw that locks the sliding section. If you can get to that when the unit is inside th

Hi Andrew, I didn't think about using flat head screws. I got some ronnd head ones. I can get some flat head screws, though. 73, Zack W9SZ

Yes, I have it on the correct side of the board. The antenna is setting flush on the board. I was concerned about the sideways play. I guess it's so small that it isn't a problem. 73, Zack W9SZ

I have a couple questions. When I mounted one of the antennas onto the pc board, I noticed a slight amount of "play" in the horn's location with the screws almost tightened. Is this critical? And does

Whatever ... the only thing I wanted to point out was that, except for pin 19 on the 16LF877, everything in the circuit was from a voltage dropped down from 12+ volts by a regulator. He was only conce

According to the schematic, the 12 volt input first goes through a 7805. The output of that (+5 volts) goes to the Murata switcher which puts out 3.3 volts. The only other line from the +12 volts goes

Both of those units look like a good choice, if you can keep from accidentally transmitting with the TH-F6A, as you say. I am most likely going to use an FT-817ND with the mic and key unplugged so I w

One thing I haven't figured out: If you do the steps 1 to 5 only, as listed below, does that disable FM for the unit on transmit? I want to use an external OCXO and I'm not particularly interested in

I guess you have two units? Do both of them do that when being received by the other? 73, Zack W9SZ Virus-free. www.avast.com

Hi Gary, At the bottom of this page at the W1GHZ antenna book site, there is a link to a program called HDL_ANT. You can measure a dish at several points and enter them into the program, and it will t

Yes, it appears the 1590CF and 1590TF are the closest. They are a little bigger. I figured with the BUD box I could just add my own flange if I needed it. Not sure the flange is necessary. Zack W9SZ V

Thanks Andrew. It is the HB-5044 I wanted to know about. The closest thing I can find in the USA is this: https://www.digikey.com/product-detail/en/bud-industries/CN-5705/377-1516-ND/1219177?fbclid=Iw

Is there a manufacturer and part number (or at least dimensions) of the aluminum box that is shown in the photograph below the pc board with the switches and LED's on it? Zack W9SZ Virus-free. www.ava

I don't know that there IS an international calling frequency for the bands above 47 GHz. Before the advent of the complete 76 GHz transverter by DB6NT, I had to ask the people I was likely to work wh