HI Bruce

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But does the 847 not supply the required voltage?? It is not from the pre-amps.? The radio powers the pre-amps.

Grim? - ZL3TV

Hello.

Sorry, but I don't?understand?why you may be looking for trouble?connecting the DC supply of the AR's LNA's to? the FT-847.
I can tell you that after 6 months of working on a faulty FT 847, that it's an? old radio, not enough technical support and a shortage of obsolete?spare parts.

Isn't it simpler to use an?external power supply?

73

Mike

?4X1LM

??

??????? ??? ??, 20 ????? 2020 ?-13:54 ??? ?Bruce Forsberg?? <?bruce.forsberg@...??>:?

I just acquired a used FT-847 and plan to use it for VHF/UHF work including getting into satellites. I have one question. I plan to get preamps and am looking at 2M and 75cm mast preamps from Advanced Receiver Research. They require 200mA each. The Yaesu manual says it can supply 300mA to the VHF AND/OR UHF connectors. I am confused if this a total for both connectors conbined or 300 mA each? Looking at the schematic I see there is one current limiter for both connectors so I assume this is a total number. I am wondering if anyone has run into this?

Thanks,
Bruce, WB6IZG

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Morning Bruce

I just looked at the website for Advanced Receiver Research, and they say all their receivers require

25ma. Well within the parameters for the 847.

Even the military receivers were at 25ma.

Hope this helps.

Happy Hunting

Stay Safe

73

Douglas Richards VE3FFR

I just acquired a used FT-847 and plan to use it for VHF/UHF work including getting into satellites. I have one question. I plan to get preamps and am looking at 2M and 75cm mast preamps from Advanced Receiver Research. They require 200mA each. The Yaesu manual says it can supply 300mA to the VHF AND/OR UHF connectors. I am confused if this a total for both connectors conbined or 300 mA each? Looking at the schematic I see there is one current limiter for both connectors so I assume this is a total number. I am wondering if anyone has run into this?

Thanks,
Bruce, WB6IZG

-- 
73
Douglas Richards VE3FFR
ve3ffr@...

I just acquired a used FT-847 and plan to use it for VHF/UHF work including getting into satellites. I have one question. I plan to get preamps and am looking at 2M and 75cm mast preamps from Advanced Receiver Research. They require 200mA each. The Yaesu manual says it can supply 300mA to the VHF AND/OR UHF connectors. I am confused if this a total for both connectors conbined or 300 mA each? Looking at the schematic I see there is one current limiter for both connectors so I assume this is a total number. I am wondering if anyone has run into this?

Thanks,
Bruce, WB6IZG

Does it matter which mode the rig is in?

Talk to Geoff at Castle Electronics. I think he can replace the cpu on your board.

/Nils SM7DVO

Hi FT847 users

I have a question:

?

I have a FT847 that will transmit immediately when I turn ON the TRX not always but nearly always

Now and then the TRX works fine for some time , then suddenly starts to transmit on its own

?

Some info:

?

MOX knob is NOT the cause

Nothing is connected, no microphone, only the antenna and power cable , so no external cause
No short inside the 8P Microphone connector

?

Did anyone see this problem before ?
please let me know here in the FT847 Group or DIRECT via?pa3dol@...

?

Many thanks in advance

?

Best 73

Sjoerd

PA3DOL

Hi Leighton,
No I haven't changed the battery as the frequency and other settings on the radio do hold after restart. Its the internal microprocessor values that doesn't hold where you enter into the hidden menu. It works while I keep the radio on but resets to 0F on restart. I somewhere read the microprocessor values are not stored using battery also the values cannot be reset to factory values . Each time I have to enter the values for each item bit bad or keep the Radio on without turning the power off.

73's
Glit M0HPF

Hi Gilt, one question - have you replaced the internal coin cell battery ?.
Leighton. GW3FSP.

I have a fantastic rig but the microprocessor is not working well means cant hold the settings and cannot return to factory settings all values are reset after power off and switched on later.
wonder anyone has a broken rig where the pcb containing working microprocessor is available. I really wanted to get this rig u and running.
Please let me know if anyone has a spare PCB.

73’蝉
Glit
M0HPF
glitsun@...

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I looked at Mouser.com and DigiKey.com both. They had them.

73

I bought 10 on ebay and paid all 10 pieces together for only $ 5 and shipping included: they were fine.

On Ebay you can find them at very low prices!

Just search MINI DIN 5 via google or via ebay and obviously check the photo of the pinouts before buying them.

73

-- 
73
Douglas Richards VE3FFR
ve3ffr@...

Yaesu uses a 5 pin mini DIN plug on the FT-847. This plug is used as a connector for a cable to key a linear amplifier. Actually they use the same connector for HF, VHF, and UHF amps.

I had a very hard time finding a connector that fit. Some (I assume from China) did not fit right. I found some that DO fit fine. I assume they are American, or possibly Japanese. In any case, they do fit OK.

In order to get any kind of a decent price I needed to buy ten. I need one to use on the rig, and want to keep one spare. That leaves eight available, for sale.

They are $5 each (yes, I will end up making about a 16 cent profit!), plus shipping. I can ship one, two, or three via first class mail for $4.60.

It is quite possible that these 5 pin mini DINs are used on other rigs beside the FT-847.

Please let me know how many you want.

Thanks.

73,

Ken, W8EK

Ken Simpson
E-mail to W8EK@... or W8EK@...
Voice Phone (352) 732-8400



.



.

I double checked and its the same for my 8900 and it works fine so I'm confused. I don't know if it's a delay issue and if someone knows what that number should be I would appreciate if you could share

John Rudolph
FCC License: N2YP-Extra Class
Otsego County Amateur Radio Emergency Services Assistant Emergency Coordinator

Oneonta Amateur Radio Club Treasurer
Chenango Valley Amateur Radio Association Co-Trustee W2RME Repeater

Associate Real Estate Broker
Country Squire Realty

23 Martin Brook St
Unadilla, NY 13849
607-437-2435 (C)
607-369-HOME (W)
607-437-3097 (WC)
john@...

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Morning John

I just went to Tigertronics website, and they have cables and wiring instructions for both the Data and Packet ports.

Hope this helps.

Douglas

I have a Ft-847, signalink, and using agwpe but I am having problems with getting mine setup for FM packet.? I have everything working and confirm it works on my FT-8900 which successfully sends packets audio but I can not get the 847 to pass the transmit audio. When I send a beacon the signalink keys up the 847 but no audio is passed through to the radio. The 847 will receive packets and it will pass computer audio from other sources through the 847 and key up the radio but no audio. I also did see the renaming the USB audio names and like I said it works very well on the 8900 but I'm lost. I did try playing with the tx delay in agwpe but still no change. So to summarize: * 8900 No issues and works as normal *847 -Keys radio but no audio for tx with no changes to setup. -Does key and pass system sounds when set to do so. I appreciate any help that might solve my issue or special settings needed to get the audio to pass.

-- 
73
Douglas Richards VE3FFR
ve3ffr@...

I've thought of using the mic input also. I don't know if my 847 is an early unit or not. I forget now but the serial number has to be G or later if I remember correctly. Doesn't matter because my serial number doesn't start with a letter. Perhaps Canadian models were different.

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My 847 is an early model and I can’t use most digital for it. I didn’t find out in time to send it in for the update. However the only way I ever got packet to work is through the microphone jack.