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Author Topic: FT-991 144 expansion  (Read 43448 times)
W2NER
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Posts: 0




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« on: December 10, 2015, 03:15:53 PM »

I know the mod is out there to expand HF but I'm looking for a 2m mod to expand beyond 147.999.  Anyone know of one?
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N0FPE
Member

Posts: 397




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« Reply #1 on: December 19, 2015, 12:48:29 PM »

why? Huh
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N9VMO
Member

Posts: 13




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« Reply #2 on: December 19, 2015, 05:45:57 PM »

why? Huh

Maybe because there are some MARS repeaters at 148 MHz???

There is even one in Ohio at 149 MHz.

Just my $0.27.

Joe
N9VMO
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W8JX
Member

Posts: 12081




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« Reply #3 on: December 19, 2015, 06:24:03 PM »

why? Huh

Maybe because there are some MARS repeaters at 148 MHz???

There is even one in Ohio at 149 MHz.

Just my $0.27.

Joe
N9VMO

It is FM too and not SSB which means a dual band mobile that is opened up will work. Shack in a box rigs are compromise rigs at best.
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--------------------------------------
Ham since 1969....  Old School 20wpm REAL Extra Class..
K7AAT
Member

Posts: 21




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« Reply #4 on: January 06, 2016, 11:22:21 AM »

Such a mod is available on www.mods.dk .

(edited Feb. 18) ...  I stand corrected by Chris.  As he points out,  the mod on mods.dk is HF only.

Ed   K7AAT
« Last Edit: February 18, 2016, 12:53:10 PM by K7AAT » Logged
AK4SK
Member

Posts: 206




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« Reply #5 on: January 15, 2016, 08:05:43 AM »

Yaesu sent me instructions to modify the FT-991 for expanded TX that was HF only. Right now the 2 meter band has no known TX expansion that I know of and Yaesu has not published one. The mod on mods.dk is HF only.

73 Chris AK4SK
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KI4HM
Member

Posts: 1




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« Reply #6 on: October 10, 2017, 07:29:36 AM »

I have a new FT-911A and I’m researching expanding Tx on HF and VHF/UHF but It’s a little confusing. I had a FT-991 a few years ago, back then I watched a YouTube video that shows you the mod for HF Tx only so did the MARS mod shown (bridged JP3003). It was more disassembly then I like but it was worth it. It’s been a few years and I do a little horse trading and one of the newer FT-991A has been added to my stable and I’m wanting to take a look inside. Surely after all this time and the vastness of the World Wide Web I can learn something new and someone has cracked the VHF/UHF Tx side of this radio but no joy :/

Here’s what I got so far: I found some photos in descriptions of how to mod this radio and I noticed how some pictures show JP3001/JP3002 with micro-min chip resistors and others show them simply bridged hmmm...

I could post the screenshots of each but this is a text only forum
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