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Hey Brandon, No dramas on what your saying - all good. Could my 10mhz max oscilloscope see a 9mhz harmonic? I do have analogue fm radios kicking around - I'll round them up and see if any detect it.

Hi Brandon, Sorry to disappear a while ago, I've been really busy on everything but radios - I run a beef cattle farm by myself and sometimes get caught up with big workloads. Fast forward to today, I got a chance to try and sniff the 9mhz harmonic on Q21 (for 36mhz oscillator) as we were...

Good tip Nomad - I will do that in the future.

What about the checking the final bias to see if its in ballpark ~50ma. Might point to an issue in the bias circuit.

I dont have a baofeng (good idea though),108mhz is top of fm broadcast band - could i use a digital fm broadcast receiver?. Also my ts430s has full working receive, so I could use thats to sniff 9mhz using diy H-field probe. I will try that.

I dont know cause my second hand frequency counter needs repair! I dont think I have another receiver that could sniff that 36mhz range either. Only random idea is to try use my laptops tv tuner card maybe as a hack...

Thanks Brandon. Just starting doing voltage probes vs schematic voltages on the 'pink' oscillator chain you described as well as IC13. They all look pretty spot on other than Q21 emitter is 4v where it should be 3.4v. Q21 tested OK

I'll focus on your diagram and just try to process stuff before I repost.

Thanks Brandon, I didn't realize you were on when I deleted that video showing static on key up but after I posted the video I suddenly had full clear audio being received 95-100khz high on ts440s. ie transmit on navaho cb on 27.405AM, received on ts440 at 27.500AM onwards for 500khz.. Basically...

Brandon I think your doing too much for me! - I really appreciate your help but also I don't you to waste too much of your time based on my lack of knowledge. I enjoy having a go at this stuff but yesterday I had a new feeling come over me along the lines of......."would it kill me to sell a...

Glad you corrected me. I was still looking at the PLL VCO's. I know the one your talking about on rf board. Thats the one I found d49 shorted and replaced and done a bit of work on it from the sonybond glue. I will look at that today and report back :)

Thanks for mentoring me Brandon. I was wondering what VCO was on vs frequency. I can now do the calculation based on your example. Rechecked the BPF diodes again (ok). I actually tested every other frequency range today instead of just 14,000mhz and its working great, its matched the service...

I recapped the PLL Board with no change to the problem. VCO 3 & 4 still voltage drifting on test points (start low and rise slowly) with same 3khz audio sweep. Decided to go check out VCO 1 on the RF Board (I had replaced a few components that had legs eaten off previously) as I read below on...

Re: Friture I downloaded it today, it can run on windows as well. I have to experiment with it. Started the PLL board recap today, just did one of the VCO's, there was countless halo/dry/cracked solder joints under its rf shield on solder side. This ts440s is worse on solder joints then my...

I'm not sure what your using there to create that but its amazing! I haven't had much of a chance to look at it today other then briefly monitoring VCO 3 and VCO 4 TP voltages when first turned on doing the above 3khz sweep thingy and both TP start low at 3v and very slowly rise up to 4 to...

The AI's are in infancy aren't they, in some ways impressive what they can do already, but still still missing the mark in other aspects. I do have more volume in manual wide but I think it may be something else then that Murata SSB filter. Tech 5 I will do that check shortly - thanks that...

Thanks Brandon, I did read your other longer post before you changed it. Its not rambling to me because I've never heard about that with DC and crystal filters as a beginner its all new knowledge to me. I enjoy your guys talking about this stuff or even disproving each other theories based on...

I never used chatgpt but now you said it i had a go - works really well. Disregard that black daughter board comment in my video, just reading AM RX goes through that as well so its ok and I have re soldered that in, like you said SSB final filter is through this: Can I use a ceramic non...

Thanks guys, the amount of time wasted chasing a red herring with L40 around wrong way.... TP11 is now at 4.7v and I just adjusted to 5.0v no problems......RX volume does not get dragged down when TP11 now probed....lesson learnt for me on this even though the previous owner must of had it out...

I guess I'm missing the point in my above post, DMM is probably OK given inductor wrong way around but I will do the full test once L40 swapped tomorrow morning.