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Mars for Serial 1C470057
Does anyone have one of those rigs? I cant get it to works on 60m and 27Mhz. Have tried the options found searching and nothing. It was purchased in Japan.
By HI8RMQ · #591 ·
Re: new, hello
I have tried 111010, nothing. I have a japanese model, I'd like to use 11m band. Gives me error. Any help?
By HI8RMQ · #590 ·
Re: If low at O/P then trace back D2016 switching?
That does not make sense, unless the UHF is banded 410 to 439 and 440 to 470 Sent: 23 July 2022 14:55 To: Andrew Lenton Cc: [email protected] Subject: Re: [YaesuFT847] If low at O/P then trace
By Andrew Lenton · #589 ·
Re: If low at O/P then trace back D2016 switching?
GO on pin 3 or the collector of Q2014, there should be a healthy signal there on RX as it is working! And on TX the seam level but a different frequency 73 Andrew Sent: 24 July 2022
By Andrew Lenton · #588 ·
Re: If low at O/P then trace back D2016 switching?
Dear Max, Take a look below: The UHF path to the LO output is slightly different to VHF so from D2018 it is the same, Q2022 is unique for UHF Bottom line: there is switched power on
By Andrew Lenton · #587 ·
Re: If low at O/P then trace back D2016 switching?
I do not believe in two faults, the VCO assuming it is a VCO, might me fixed frequency and the if moves to change frequency. Check 8 V on both VCO, tx rx, the check the o/p, tx and rx share a path,
By Andrew Lenton · #586 ·
Re: If low at O/P then trace back D2016 switching?
Am I making the correct measurements?
By Max Donoghue <ve3tmt@...> · #585 ·
Re: If low at O/P then trace back D2016 switching?
Seems odd the voltages are good on the VF0 control voltage pin! There is not much to go wrong on a VCO I will see if I can find one! Get Outlook for Android
By Andrew Lenton · #584 ·
Re: If low at O/P then trace back D2016 switching?
I'll button it up for now so I can get back to using it and look for a PLL board to replace. Would probably be the easiest remedy.
Re: If low at O/P then trace back D2016 switching?
Sorry did not spot the attachments check directly on the the UHF TX VCO Does UHF RX work, judging by your measurements, I would say no. VHF frequency of 190 Mhz was unsepected, so the LO is high Looks
By Andrew Lenton · #582 ·
Re: If low at O/P then trace back D2016 switching?
No content Get Outlook for Android
By Andrew Lenton · #581 ·
Re: If low at O/P then trace back D2016 switching?
On Sat, Jul 23, 2022 at 6:03 AM Andrew Lenton <a@...> wrote: Hi the SAT button on and off a few times! > * Hitting the SAT button lights up all the buttons for sat operation. Do hear
By Max Donoghue <ve3tmt@...> · #580 ·
Re: If low at O/P then trace back D2016 switching?
Hi the SAT button on and off a few times! Check Q2017 is switching as this will kill off the UHF RX and TX LO this should be working as RX is working can you confirm this, tx on a hand held or
By Andrew Lenton · #579 ·
Re: UHF TX issue
Indeed we are, I will track the fault down over the weekend by studying the circuits 73 Andrew Get Outlook for Android
By Andrew Lenton · #578 ·
Re: For Sale
Here are a couple of pictures for you all.
By Russ N4MAV <n4mav1@...> · #577 ·
Re: UHF TX issue
For those who were following this thread... I received my Tiny SA signal analyzer yesterday and started checking signals. https://www.tinysa.org/wiki/ The TX local oscillator signal is present on
By Max Donoghue <ve3tmt@...> · #576 ·
UHF TX issue
Hi Max, OK you need to check J3006 TX I.F., and J3007 TX LO, they are common to VHF and UHF, The LO is the bit that changes frequency, check it does and the level is the same on VHF and UHF, if
By Andrew Lenton · #575 ·
Re: Schematics?
J3008 - TX IF ~ 600mV Checked D3035 and D3036? both 0.762V one way, nothing the other
By Max Donoghue <ve3tmt@...> · #574 ·
Re: Schematics?
Voltage readings: J3015 pin 7 (UT8)? 7.83V J3016 pin 3 (UT8)?? 7.83V J3011 pin 1 (UHF T8)?? 7.83V
By Max Donoghue <ve3tmt@...> · #573 ·
For Sale
Hi Everyone, I received the below in my email today.? I hope somene can help the gentilman. :)? I'll give the group first dibs on this, then it'll be going up for grabs on QRZ.com.? Do NOT
By Russ N4MAV <n4mav1@...> · #572 ·