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cabinet fastners
7
I( have several Yaesu with broken fastners . Does anyone have a source for these? Jerry
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Hi all, As I stated in another thread; I am also a curious soul who wanted to get an FP-301D CW IDer working; although I took the different route of reverse engineering the basic format. Then I found that Randy/W7CPA got the Japanese manual with the programming table. It verified what I'd figured out with the exception of giving me bit lengths to work with. I am planning on writing a small simple utility in Python (or some other language possibly) that will generate the binary data you need to write to an EPROM/EEPROM that should work with some logic level circuitry. There's also no reason this same data wouldn't be useful on the original style PROM. Data is data...you flip addresses on and you get data out. Everything else is just TTL vs CMOS and open collector vs tri-state. Thus far, I've made a table of letters and numbers that contain the bits needed: https://pastebin.com/7F1DSzWm I also...using my own list...worked out "de nq4t" by hand: 75 10 1D D7 15 1C 70 00 Yes, that's all in hex. This the first thing I have to figure out the best way to handle. All the numbers and letters are varying bit-lengths and due to being time-code, you can't really just pad things between letters. You could, sure. The only real limitation you have is 8 bits of "0" triggers it to reset the ID circuit. Even the sheets say you can use fewer or more blanks between letters/words as long as you remember that rule. I think there might be a better way of doing it...because at this point I haven't even written any software...all the binary and hex I'm producing was figured out in my head. 011101010001000000011101000111011101011100010101010111000111 This is the binary string I came up with originally. So I just broke that down in to 1-byte (8-bit) chunks: 01110101 00010000 00011101 00011101 11010111 00010101 01011100 0111 As you can see we actually came up with 7 bytes and a nibble. So what I'll need to do is have my software do is just pad everything out to fit evenly in bytes. With a pre-defined table it's mostly just a case of text processing. That's not easy to do in Python so it'll take me some free time to figure it out. I have also considered modding things to replace the 74188 and 74151 with just something like a 28256 EPROM. This would be rather easy to do by tying the address lines for the 74151 to the lower address bits and use the 74188's as the higher address bits. There's more than enough space to waste in a 256kbit EPROM; it would just make programming a LOT more difficult since rather than storing time code as bytes...you'd have to store them as specific addressing. It might be easier to just outright replace all the logic (keyer and clock) with a microcontroller too. But I'll still get some imaging creating software done since I'll need it for my development/hacks. 73, Jay/NQ4T
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FT-301AD free to a good home
4
Just given one. No supply or cable. Needs cleanup and testing IF someone is interested in it. I'll do this if I know its going somewhere if its OK. I live near Charlotte, NC It goes to recycle otherwise. 73, Bo W4GHV since '54
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Hello, I’m a new user in this group. Yesterday I bought a FT-301 and the tune knob is replaced. I want to make this rig original and perhaps is here somebody that has a spare knob and want to sell it? Greetings Marcel DK1NL.
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Update on my FT-301
2
Got the radio re-assembled the other day. Installed LED's in place of the three incandescent bulbs. Trying diffused yellow, as I've always felt the white bulbs gave the front panel a too-stark appearance. Might change my mind later. Made a few contacts on 20 and 75. All said the rig sounded great. Then suddenly kaput, no output on sideband! CW is fine. Strangely, the mic gain potentiometer inside the rig has gone open. Tried re-soldering the connections, and ran it end-to-end about 20 times. No change. So weird !! So now I'm in need of a replacement. Or I suppose I could try disassembling the pot to fix it, but that seems doubtful. I've got all sorts of pots in my parts drawers, but not a one that's 470-1k ohm or so and would fit in that location. Minor item which will be solved soon enough, but a bit disappointing. Oh well, on to the internet I go to search for a replacement... Joel, VE6EI
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RF Tracking - adjusting T1, 2, 3
2
Has anyone actually done this part of the FT-301 alignment? On 4.0 MHz you adjust T2 & T3 for maximum output power. Then adjust T1 for best Rx sensitivity. Problem is that all three of these in the "Tune" or preselector section are seriously "gooped" in place. I could remove the hardened resinous material, follow the procedure, then use something to lock them in place again. But is it worth it? This radio is putting out about 82-85 watts on 4.0 MHz, and sensitivity is pretty good. Maybe not worth it, just to do a "complete" alignment...? Joel, VE6EI
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Photo IMG_7055 Small.jpg updated
#photo-notice
The following photos have been updated in the FT-301 VFO Mechanism Repair album of the [email protected] group. IMG_7055 Small.jpg By: Joel Weder <jweder@...>
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Low power output on 80 meters.
3
I have very very low output on 80 meters. It is so low that it does not indicate any current draw on the meter. I can hear the signal on another receiver. I did not start troubleshooting with the scope yet. I just need a starting point so I can start the trouble shooting process. Can anyone give me a starting point ? Robert KH2BR
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no output on 80 meters
I have no output on 80 meters, all other bands are ok. Where do i start to troubleshoot this problem?? I can hear output on a external receiver. Thanks !! Robert KH2BR
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Yaesu Ft-301
7
Good day Im a new yaesu ft-301 user. I have a real head scratcher. My yaesu ft-301 works fine until you press the ptt key then its like it stays in tx mode and the sound output does not return to normal. If it does that you need to power down the radio and power it up agen. If anyone can give me a litil bit of inside why it does that it will be much appreciated. 73 ZS6LVJ
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CW output on FT301
11
Hi Folks….I am well on the way to getting my bargain 301 back on the air, but I come across a problem that I can’t figure out. I have got the SSB alignment pretty much done….10Watts out( it’s a 301S) and good Rx sensitivity. However I am only getting abut 20mw out on CW! I have read and reread the handbook bit I cannot see any way to adjust the cw output. To be honest I can’t actually see how the CW is generated…..no separate carrier Crystal or any way of unbalancing the balanced mixer or even an audio oscillator. I am at a loss…..any ideas greatfully received. Best regards Dave….G4DAX.
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My Bargan FT 301S?
2
Well thanks to the help received on here, my bargan price 301S is compleatly aligned and is up and running. Now I shall have to think about a paint job for the case, but I have had 2 QSOs on it with compliments about the audio quality. Thanks folks. Dave….G4DAX
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Welcome Friends
11
Welcome to the new members of the 301 group! This is the place; all things Yaesu 301. You might want to take a minute to introduce yourselves. This is Rex, K0KP located at Fish Lake about 15 mil. NW of Duluth, MN. My FT-301D was purchased new by me back in 1978. It is still one of my favorite radios. Not too long ago I took the time to replace all of the electrolytic capacitors in the rig. The job wasn't too bad really, but did take some time. This did fix an intermittent RF power problem where after a few minutes of operating the power output would start to drop, I suppose one of the electrolytic capacitors had become leaky. This had been a pesky problem I had looked for for many years. Now the rig is completely 100% up to spec and looks beautiful. I run my digital version with the original Texas Instrument "TIL" chips in the digital readout. Back when the radio was new I ordered a few spares which has allowed me to keep mine operating with all digits completely in tact. For those that might not be aware the TIL display chips have a habit of going bad and are now pretty much unobtanium. For now that is it for me, like I said if you haven't had the opportunity to introduce yourself please take the time to do so.
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FT-301 low mic sensitivity
6
Does anyone have a 301 that does not require all mic gain controls to be maxed out and close talk the mic to even get close to full output? I have been struggling with this 301 since I got it trying to get enough modulation to get full output on SSB. On CW, full output is no problem. I thought maybe I had a defective LD3141, but every test I do tells me otherwise. The only thing that works is an outboard op-amp at 300x voltage gain driving the balanced modulator directly with 700-800 mv at full audio. I have built duplicates of the LD3141 on the breadboard with exactly the same gain as the original component. With about 2-3 mv into the LD3141 from a dynamic mic, I get between 150-200 mv out to the balanced modulator but I cannot find gain specs for the LD3141 to know if this is good. I do not want to condemn this component until I know better. All the modulator diodes junction test ok and exhibit the correct Vf for a germanium diode. I do not see any indication that they were changed before I got it. Carrier points have been verified to be correct, as well.
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Crystal / External FBO / VFO Replacement for FT-301D
5
Greetings. I am not new to Ham Radio, although I have not had a license until now. I am going for my Technician License now, then my General. A friend is sending me his FT-301D, FP-301D and other items. He doesn't use it any more. I am looking at Mods, Hacks, etc. and came across this video: https://www.youtube.com/watch?v=PaCrMPe-pR0 Further investigation revealed others who have created VFO's for their own radios. I am going to build this and try it as an external VFO and replace the need for the Crystals. Or, I may make a dual-output version and plug in both an external VFO and a Crystal oscillator.
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FT-301S transmits AM but not CW or SSB
2
Hi folks, By its original owner I was given an FT-301S (QRP and analog) that had been stored indoors in its original box for 20+ years. The radio is immaculate, inside and out. The receive side works fine, and so does AM transmit. That means the RF output stage is ok. But CW and SSB transmit produces no output on any band. Looking at the schematics, this seems to implicate the IF board, the filter board, or the NB board. Anyone care to guess where I should start? I have examined all three boards for leaky electrolytics, etc but I didn't see or smell anything amiss. By the way, Earl VE3AB at Netty Electronics has retired. 73 Chuck K4RGN
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Power switch for FT-301?
3
Hello! I'm trying to repair and FT-301 for the widow of a silent key so it can be sold. I found documentation showing the power switch died with the power on, so for a time he turned it on with the power supply. Anybody have a switch to sell or know where one can be found? Thank you, Brian
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Selling complete Yaesu FT-301D Station
Friends, I'm selling my vintage Yaesu FT-301D station. I believe I have every piece of the matching line, including the FT-221R 2 meter rig, microphone, headphones, "phone patch." The main pieces are the 301D Transceiver, power supply, external VFO, scope, antenna tuner, and the 2 meter transceiver. I have photos of each piece that I can send to you upon request. I don't want to try to ship this gear. It's available for pick up in Delmar, NY. (Suburb of Albany.) I'm looking to get $650 for the whole lot. 73 Ray Parsons KG2B This email has been checked for viruses by Avast antivirus software. www.avast.com
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Speaker Lead Breakage
If you are like me it seems every time one removes the top cover the short speaker lead is forgotten and it tends to break off the rather delicate lugs on the little internal speaker. Take a very small cable tie and make a strain relief to hold the wire firmly around the nearest clamp that holds the speaker in place. Next time you lift off the cover the strain from the wire won't break the speaker connection lug. :-)
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Image Name
Sat 8:39am
Sat 8:39am