开云体育

Yes thanks for that I have found the fault it was the 2nd TX I.F. Mixer out of lock! And there are all sorts of little mods everywhere and not on the circuit diagram 73 Andrew Sent: 07

Hi Andrew, Have you checked the reverse side of the AF-board? i ,had an "impossible" problem with full power on FM/SSB but only 100 mW in CW. There was a sloppy "factory mod" under Q1081. /Nils

Hi Nils, Thank you very much this compares to my readings, it is odd not to see the AF output on pin2, but it is there further up the food chain on the input to the balanced modulator 73

Hi, I did a brief check on a working 847: Q 1053 Pin 1? ?3.8 Pin 2? ?1.9 Pin 3? ?3 - 5 depending on mic gain Pin 4? ?3.9 Pin 5? ?gnd Pin 6? ?nc Pin 7? 3.8 Pin 8? ?4.2 Pin 9? 3.7 Pin 10

Adding circuit tat was cut off I have also added some voltage for Q1063: Pin 1, Pin 3.8V 2, 1.8 Volt, Pin 3, 3.6-4.8V (mic gain control range) Pin4 3.7V Pin 5 earth, Pin6 NC, Pin7 3.7V, Pin 8 4.2V

My basic problem is I seem to have lost Mic audio after Q1053 there is nothing coming out of Pin 4. Pin 4 travels half way around the radio and ends up at Q1038 Pin 6. Q1053 is an electronic

Updating batter for battery! Sent: 05 March 2022 12:53 To: [email protected] Subject: Re: [YaesuFT847] new, hello No, does not have 4 meter mod. The resistors on the board don’t

1 OHM is fine, a link and 1 Ohm in this instance is the same thing, probably work fine up to 470 ohm? 73 Andrew Sent: 05 March 2022 12:53 To: [email protected] Subject: Re: [YaesuFT847]

No, does not have 4 meter mod. The resistors on the board don’t seem to be 0 ohm, they’re 1 ohm. Have others found this? All documentation I can find says it doesn’t matter.

Dear Owners, took delivery of the parts on Saturday and took some time out to fit them today and can report after gutting all the burnt carbon and working the board. New components are in and

I have enclosed a pic of mine TX 1.8 to 70 140 to 174 420 to 470 MHz I removed the batter for better pic Avoid Transmitting 30 to 40 MHz as the HF low pass filter will heat up and burn at 100

Also try 111010. It seems there are different configurations , and possibly conflicting evidence. I doubt if Yaesu would make a custom IC, just for JA

nope, still get “error” (after setting jumpers: press FAST and LOCK, and power up, menu 39 ALL INIT, press MCK/W, Try TX on 144 MHz —> works Try TX on 147 MHz —> “error"

tried 110001, no work. Yaesu document says that jumpers 7-9 should be open. Where are these? I don’t see jumpers 7-9 labeled on the PCB. ( After setting jumpers: fast-lock pressed, power on,

Hi here you go 733 Andrew G8UUG

Here you go 73 Andrew

On the jumpers try 101011 by jumper number, do reset after. Should give HF coverage, 144-148 and 430 -450 [email protected]> wrote:

Hi this is very straight forward let me dig out the info for 73 Andrew

Hi FT-847 fans!! This is Carl, KO4SSA. I just purchased a used 847 on eBay, from Japan. I’m wondering how to modify for US bands. As delivered only TX 144-146 and 430-440. I’ve searched high

Nice one! Sent: 23 February 2022 16:12 To: [email protected] Subject: Re: [YaesuFT847] Yaesu FC20 [Edited Message Follows] If yoy need some close up photos of a not toasted FC-20. Let med