Hi Riccardo, I have experimented quite a bit with this 4066 mixer and found very similar 3rd order intercept points and sensitivity/noise floor which is...
I have a non-working 30m receiver mounted in small Whitman's candy box for sale. Just not smart enought to get it working. Has antenna input and output pin...
Hi Frank, Tony will be able to advise you on the availability, or not of the special IF versions. The problem with the current design is availability of...
Im looking to use some SDR software and a Icom IC-R100 radio, I have modified the radio with a 455Khz output from the 15khz filter to the AM/FM decoder. I...
I think I found the problem. I'm only getting .14 v in pin 16 of U3 (mixer). There is 5v at the pad just not on the pin. I believe after re-soldering I'll be...
Thanks for the reply Tony. I'm getting 2.66v at the qsd0 ad qsd1 probe points. I'm also able to clearly hear the 28.224 Mhz signal being generated by the...
Ok is it ready to deliver or is it another "CHECK BACK SOON"!!! 73 2009/10/30 ik7tad op. Riccardo <ik7tad@...> ... -- Jose (Ct1aos) Ok is it ready to...
Hi Tom, greetings to you too. Your questions are valid. I have used different types F, TI, ON, Pericom for the 2T H-Mode Mixer but I have not done any real...
Hi, I am wondering what could be the advantages/disadvanteges of using such a mixer as an 74HC4066 or 74LVC4066 as made by Tasić Siniša YU1LM in its SDR...
Hai all Thank for information about FST3235 which didn't appears at my local electronics stores. How's about the TVL2462CD dual op-amp?..Are there complement...
Inquiring minds want to know! I had the same thoughts comparing datasheets. Is there more than meets the eye on the 'real' numbers instead of the nominal or...
Greetings Gian, I am curious why the Pericom is considered the best choise and I am wondering if I should make an effort to source the PI5C3125 in the SOP...
Hello again--  In about 5 weeks I will be asked to submit my clubhouse column for the winter medition of QRP Quarterly.  In 2 weeks I get my right knee...
Thanks to Bob and Alan, kind souls who pointed out that the divider must be clocking. It's embarrassing, but I learned that one shouldn't try using a K2 to...
Hi all, As a follow up, I just raided my junk box again, and tested a number of low voltage zeners on a 12v supply with a series 2k2 resistor. The voltage...
Hi Brad, Points noted, but certainly not worth the bother of putting a regulator in there, not that critical. The whole idea is to provide simple, stable...
37657
Brad Thompson
brad.thompson@...
Oct 29, 2009 2:25 pm
... From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com]On Behalf Of g8voip Sent: Thursday, October 29, 2009 8:57 AM To:...
Hi Robby, The hair pin of R1 is directly connected to the 3.6V zener diode cathode. I would have imagined the whole point of having the zener diode there is to...
It's OK. See http://www.wb5rvz.com/sdr/sr_6m_2m_converter/01_ps.htm#testing tx es 73 de robby wb5rvz What happens in the shack Stays in the shack!-----...
Hi David, 4mA flowing through the zener diode should be enough for it to regulate properly, as the current flowing into G2 of Q1 is very small. The diode...
After applying 12VDC I measure 2.97VDC on the hairpin lead of R1. The diode is rated as a 3.6V zener specified at 20mA. The resistor R2 in the circuit will...
... From: "David, K2MUN" Subject: [softrock40] Divider in Lite II ... This means pins 6 & 8 are around 2V5? If so, it should be clocking and you need to look...
Hi David, With the two output pins from the divider around 2.5v, then they must be active in some way, and therefore LO must be getting to it. If it was not,...
Hello, I have Xonar D1, too. It is cheap but very usefull sound card. and slightly offtopic. Chinese cheap laptop about $240USD have 96kHz stereo internal...
Is anyone using a softrock receiver in the IF of an ICOM 765? If so would like to hear from them as to whether it worked well and how it was inserted in he IF...
Hi Bob, Thanks for the reply. Pins 6 and 8 are at 2.47v, which is almost exactly the author's values. I agree that a scope would be nice. I will try to dig...
