Hey Mike.
Changed it today, nothing wrong with it, took the opportunity to resolder the joints around the area, no difference.
Will retake measurements of all TP again tomorrow and may crank up the signal gen a few db
Br
John
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On 9 Feb 2025, at 21:35, Mike Anthony via groups.io <g4thn@...> wrote:
? Indeed, I get 112mV as well at the junction of R117 & R118. ?So something is shorted to ground here. R118 perhaps?
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On 9 Feb 2025, at 15:10, reeferjon via groups.io <reeferjon@...> wrote:
?
[Edited Message Follows]
Thank you Mike.
I do have the afore mentioned pages and they are great IF the set is working :-)
?
I did some more investigation around Q106, all of the supplies measure correct.
No o/p on pin3 which is TP107
No i/p on Pin11
?
TP101 confirms as 58Mhz
Then we come to a PD made up of R117 and R118, I'm not getting anything 'measurable' after R117, what level would that lightly be.
I calc that if i/p is 350mV then o/p should be around 112mV.
?
I know the tracks are a bit fragile on these so will await a response before unsoldering on end and checking the values of R117 and R118.
<Screenshot 2025-02-09 143051.jpg>
