开云体育

What brand, and model oven did you buy?

Des, yes, that's quite possible.... when designing SDRadio I took into consideration a rather small imbalance error to correct, based on the hardware I was experimenting with at that time. So, to make

Hi Bill, Although I haven't tried it yet, that is supposed to be how it works, the surface tension does hold the parts on the bottom side in place. They say to do the side with the smallest parts

Des wrote: Des, yes, that's quite possible.... when designing SDRadio I took into consideration a rather small imbalance error to correct, based on the hardware I was experimenting with at that time.

Bill Dumke wrote.... So I next swept the input with the low pass filter output of a DDS-60 fed through a 10 dB/step step attenuator to set the level at the SoftRock-40 RF input.... End quote: Hi Bill,

YU1LM, Tasa has designed a tunable BPF for his SDR. See http://www.qsl.net/yu1lm/homebrew.htm 73, Marsh, NC7V

Hello Alberto and the group, Alberto wrote.... SDRadio doesn't have an automatic rejection adjustment, but a manual one. Have you tried to minimize the unwanted response by adjusting the sliders in

About 70 boxes full of parts, boards,etc. I have to go through all the boxes one at a time, then put them back, it's cold in the garage right now.

I think the even harmonics should not be a problem, as indicated. But, I thought the odd harmonics were supposed to be 6 db down for each step. I had a spice model once and I think (but cannot be

Hi Daryl, Please send me your mailing address and I will get one of the 14.06 MHz crystals in the mail to you. No charge when there is a bad part in one of the kits. Glad to hear things are working

Folks, I got my Softrock working fine on 40m, what an amazing piece of hardware ! When I tried to get it running on 14mhz, I found the oscillator dead. After much circut tracing, I've decided that

Thanks for the reply sir. ok than, i just ordered it. I hope i can get it to work. yeah its really not that expensive either. is would project that of following

How do you do double sided PC boards with SMT on both sides. Will surface tension hold the SMT parts on the upside down side when you reheat? Bill WB5TCO Bob Fish K6GGO wrote:

I'm not familiar with that chip, most use newer chips, but if that is what you can easily get and it it's not horribly expensive, I would go ahead and get it. It will give frequency mobility so you

no right ? set Kees, I'm using a DDS30 set to 4mhz connected to base of SR40 OSC transistor with feedback caps removed. I have a HP654 generator with calibrated output attenuators. By using one of

the Kees, I just reconnected my test SD40 setup using DDS as 4x vfo although it will hear the even harmonic (way down) it's the odd that is predominate. I set DDS to 4mhz for a receive frequency of

Not just odd and even multiples, it can respond to fractions 5/8....to keep unwanted signals, increased dynamic range, and keep the noise down you need a front end filter as tight as possible. Saying

Disregard message below I cheched a 30mtr rx it responds to even and odd harmonics need more testing. scheme

Disregard message below I cheched a 30mtr rx it responds to even and odd harmonics need more testing. scheme