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Kurt, I am having almost exactly the same experience; with the 20 meter D4D as well as with the QRPGuys DSB TRXCVR. I am inclined to believe that double side band is not a good way to go. I suspect

Hello All, I have a 20M D4D, and I think I may have a problem with it. I have been a bit mystified that I have so far only had 1 contact on this thing even though I've been on the air with in for

Hi John, For what it's worth, I built two D4D kits and did effectively no real testing (my bad!): but in both cases the kits worked out perfectly. I just followed the instructions carefully and made

My bad for typo with underline. When it is working with 15p and 27p, 15p and 27p will give about 15*27/(15+27)p capacitance in parallel and it is lower than the load capacitance of the crystal so it

How the crystal is pulled: John, When it is working with 15p and 27p, 15p and 27p will give about 15*27/(15+27)p capacitance in parallel and it is lower than the load capacitance of the crystal so

Adam I hope you can forgive me but after checking the part placement for these two capacitors at least a dozen times I just noticed I have C2 and C3 swapped. I have to go out soon but when I retire I

my mistake. C2 is the 150 and C3 the 27. John K2JHU... [email protected]> wrote:

Thank you for getting back to me. My C2 in marked 27J and C3 is marked 150 which we assumed is the 15 as different manufactures have different markings on there parts. Also the way i determined the

John, Make sure the oscillator capacitors used with 14.070 crystal are 15p and 27p. If not, you are referring to the wrong part list. Make sure the way to measure the frequency is correct. Your

Adam this did not help. The documentation and schematic say for the 20 meter version of the kit the 14.070 crystal is pulled to the ft8 frequency of 14.074. My unit does not pull the 14.070 crystal

John, See this thread. /g/crkits/topic/32736574#2816 14.070 crystal is okay for filter with relatively big insertion loss. Thanks, Adam

Well I don't understand. They sell lots these kits. Not sure how many are for 20 meters as the 20 meter kits are the only ones that pull the crystal frequency. I think I will contact the owner of

Then your out of luck. You can probably pull the oscillator crystal up 4 kHz with a series trimmer, or at least get it in the ball park. That’s about the limit you can go and retain stability. But

Both crystals say 14.070 K2jhu

What frequency is the crystal cut for? KD1JV OK I understand what you are saying. The problem I am having is for the 20 meter D4D kit from crkits. There are 2 caps, one from pin 7 of the NE602 to

OK I understand what you are saying. The problem I am having is for the 20 meter D4D kit from crkits. There are 2 caps, one from pin 7 of the NE602 to ground and one going between pins 6 and 7 and one

Capacitive loading lowers the crystal frequency, which are typically the two caps on the SA602/612 pins 6 and 7. But if you have a 14.070 crystal but really want to be on 14.074, you need to put a

Hi all. Hoping someone can advise me what causes the pulling of the 14.070.0 crystal to 14.074.0 In step 3 of the manual it states by adding a wire to the antenna termanual of your transceiver and

Conor I've been using Dimension 4 to get the correct clock timing for a while now and it works great. I t tried Minberg but was never satisfied with it. John

When you "go live" with your radio, remember that your computer time must be exact in order to both receive and transmit correctly. On my Windows laptop, I could never get the in-built NTP sync to