Thanks for the great quality video with explanations. There are a few things you might consider when doing that. 1. the impedance of the test point may not be 75 Ohm, which is the input impedance of the dongle, so depending on the stage, you might cause a mismatch that may ruin the leveling in all the following stages. 2. the over voltage protection diodes (BAV99?) in the dongle may cause intermod if the impedance and voltage levels at this point are high and the last amp has enough drive to not be attenuated from the dongles load and maintain relatively high RF voltages for a receiver stage. 3. running the unbuffered signal along a coax cable with an impedance not equal to the test point might bring noise from the outside into the IF stage of the transceiver ... e.g. USB noise created by the often poorly blocked DC/DC converters used in notebooks. 4. running the coax with the USB noise on the shield right into the radio, not grounding it on the chassis may also be a source of noise ... so once you have been proving the concept, make sure you run the signal via a chassis-grounded connector ... maybe also use common mode choke on the cable and things should be cleaner after that. So if this experiment shows any of the mentioned effects, you may consider inserting a single stage impedance/buffer amplifier consisting of a single J310 FET that taps into the text point with just a few pF towards its gate, in order to get rid of any DC components and create the least possible load onto the IF circuit. Some very simple circuit like e.g. Fig. 4 on this page ... you have to scroll a bit sites.google.com/site/linuxdigitallab/low-noise-crystal-experiment/hartley-sweep-genarator-experimental might already be good enough ... it looks good, since you don't need amplification, you just need linearity and impedance conversion. As a nice side effect, apps like SDR#, SDR-Console and I believe HDSDR as well offer smart noise filtering on the IF and audio level, which is much better than most transceivers built in noise reduction, if there is any. And receiving DRM with freeware is a fun new aspect as well since 10KHz bandwidth should not be discriminated in the first IF stage. Enjoy

@sa6ham

7 жыл бұрын

This comment is gold. Many thanks +n1vca!

I use a RSP1A SDR connected DIRECTLY, just like this video, to a Kenwood TS-570DG. I just left the lower cover, the top of the filter open, there's space to introduce the SDR RSP1A to the open carrier of the transceiver. Short cable all. Very good, very good results with SDR-CONSOLE v3.02 software, both at RX and TX! Tnx SA6HAM! 73 de Calin YO2LOG

@kallemuller1571

4 жыл бұрын

Hello Calin are you still using your TS 570 rig? Can we get in contact to Share your experiences? 73! Kalle DH6KM

Good job! (every detail was shown in the video which was good for a beginner like me. I'm going to install my first pan-adapter next week: Icom R-72 + SDRPlay)

For general knowledge ..... The Kenwood TS-570 Intermediate Frequency: 1st IF 73.05 MHz (73050 KHz),(73050000 Hz). .

You do need an up-converter depending on the model of SDR stick you get. Most stop at 24Mhz. There is an experimental driver available for SDR# that allows the SDR RTL models to go down to like 13-14Mhz. I have the same setup as SA6HAM but was unable to see anything below 24Mhz in HDSDR. Just bought a Ham It Up converter and will put it in line before the SDR stick which should allow me to get down to 100kHz.

Many thanks. Very helpful information. I will also try to do this on my transceiver.

thanks a ton for this tutorial. I just fitted my 570 with this last night and it works great. 73 de ve1xt

@sa6ham

7 жыл бұрын

Really glad to hear it! Sorry for replying so late.

looks to be plenty of room on the back panel to mount a BNC or RCA chassis connector !!!

This is class, thanks for taking the time to record this, it’s very useful indeed. Do you have any update on how well it worked and how is it now? Thanks. MW6WHL

I haven’t seen this kind of mod before. It’s an interesting one as I’m about to buy one of these radios. But.. what happens when you TX? Doesn’t that overload the input to the dongle?

gonna try it with my TS-940!! wish there was software to make it display like a regular pan-adapter display or like on the Icom IC-756 Pro II!!!

Are there any other adjustments required in the SDR software. I have this exact TS-570 setup and I'm getting nothing from the dongle. I'm using the SDR-Radio Console Ver 3 and an RTL-SDR dongle with HF which can tune from 500 kHz to 1.7 GHz

Will an up converter be needed for this to get below 15MHz?

Thanks for the quality video. 73 de LY3SR.

@sa6ham

7 жыл бұрын

Thank you! 73!

very cool very very cool

the SDR just sees what ever frequency the TS-570 passes to it? No need for an up converter because the 570 has already done that? Great video thank!

@sa6ham

8 жыл бұрын

+solidsnake182 Exactly. Part of the stuff the transceiver does is change the frequency in various stages. At IF stage 1, what ever frequency the VFO is tuned to instead becomes 73.05 MHz.

@solidsnake182

8 жыл бұрын

+SA6 HAM thanks, so the SDR should be tuned to 73.05 MHz on gqrx, thats pretty cool.

@sa6ham

8 жыл бұрын

+solidsnake182 And in say HDSDR you can tell the software the offset frequency and connect a data cable so the software can display the "correct" frequency on the display. That's my next goal, but ordering from china takes forever...

hi i am going to do this on my radio (i also have a kenwood ts 570d). i have already fitted the little plug inside my rig but the dongle i used got really hot and did not work properly i have ordered the same dongle you used can you tell me if i need anything else. i am completely new to this so please let me know anything you deem necessary.

Would this be possible with a radio like the Yaesu FRG-8800? i have one of these dongles lying around. thank you

@sa6ham

7 жыл бұрын

I'm sorry, I don't know. Give it a try, but be careful!

Any way you could look at a kenwood ts140s? How would one tap that?

@sa6ham

7 жыл бұрын

Sorry for the late response. I'm not sure what to look for in specific models, I was just implementing someone else's plans on my machine and documenting it.

I connected to the IF pins. Now I have NO audio in side band. Could this be an issue with the side band or AM. Could this be a filter issue?

@sa6ham

10 ай бұрын

Sorry for the very late reply. And I don't have a good answer for you either. I haven't used my TS-570D since then. I took a hiatus from the hobby and lent it to a friend who's had it in storage. Mine might have the same problems, or your problem might be unrelated to the IF mod. No idea I'm afraid. :/ I hope you already fixed it!

I have not been able to get my RTL-SDR R820T2 RTL2832U Version 3 dongle to work as a panadapter with either my Kenwood TS-570DG or my Yaesu FT-920.. The dongle I bought from Amazon is smile.amazon.com/RTL-SDR-Blog-RTL2832U-Software-Defined/dp/B0129EBDS2/ref=sr_1_4?s=electronics&ie=UTF8&qid=1513624240&sr=1-4&keywords=sdr The dongle works fine otherwise as a ham/shortwave/police monitor. I have tapped the proper location for the 1st IF in both radios and inputted the proper 1st IF frequencies in HDSDR. I can control radios with OmniRig , but my panadapter display shows nothing but a few random lines. Just does not work! Maybe it is the particular dongle I am using. Also, my computer is plenty fast ...I7 32gb ram, etc..... Any ideas?

Oh man , I cringe every time you drag the radio around on that table top , That's one sure way to scratch up and destroy the top of the front panel for sure ... At least put some cloth under it or foam ....👎 ... Other than that a decent enjoyable video .

Que serviço porco, detestei.