Re: From bad to worse

I have a 301D doing the same thing

KL7AM

----- Original Message -----
From: Bob Isselhard <robertisselhard@...>
To: [email protected]
Sent: Wed, 09 Nov 2022 22:48:42 -0500 (EST)
Subject: [yaesuft301d] From bad to worse

Well, after buying TIL306's and TIL308's and replacing them, now I have an FT301D that doesn't change frequency.? Just sits on the low end of whatever band it's switched to.? (3.500, 7,000, etc.).? Anyone have any ideas?? This radio is cosmetically great, and did receive very well; the only problem was the leftmost digit wouldn't display 2's, 1's only and the tenths of Khz digit (rightmost) had some segments out.? I never should have worked on this over Halloween !!!?? Help.? Anyone?

From bad to worse

Bob Isselhard

#269

Well, after buying TIL306's and TIL308's and replacing them, now I have an FT301D that doesn't change frequency.? Just sits on the low end of whatever band it's switched to.? (3.500, 7,000, etc.).? Anyone have any ideas?? This radio is cosmetically great, and did receive very well; the only problem was the leftmost digit wouldn't display 2's, 1's only and the tenths of Khz digit (rightmost) had some segments out.? I never should have worked on this over Halloween !!!?? Help.? Anyone?

Re: Need TA7089M

#268

Well, I have 6v but still neither the radio VFO or the outboard VFO work. The digital readout changes as it should with the band switch but no VFO

I tried to measure the radio VFO output with my scope but no joy.?

Will do some more checking..

Show quoted text

----- Original Message -----
From: Robert Holsti via groups.io <rholsti@...>
To: KL7AM <w7apm@...>, [email protected]
Sent: Wed, 09 Nov 2022 09:38:04 -0500 (EST)
Subject: Re: [yaesuft301d] Need TA7089M

Try mouser and look for a 6 volt LDO regulator. There is always a work around.

Re: Need TA7089M

#267

Try mouser and look for a 6 volt LDO regulator. There is always a work around.

Need TA7089M

#265

I read where Yaesu had a workaround for the TA7089M using the DIP version? and that would work for me too. Also a working PB-1436B IF board would work
The radio powers up but the VFO doesn't work and appears there is no regulated 6v to it supplied by the above IC
Any Leads appreciated.? I came into possession of a 301D with the power supply, VFO, and the scope.
The radio powers up but the VFO doesn't work and appears there is no regulated 6v to it supplied by the above IC

Thanks!

Marty
KL7AM

Re: Test

#264

Seems to work. :-) Jim al7fs

Show quoted text

On Tue, Nov 8, 2022, 8:08 PM KL7AM <w7apm@...> wrote:

Test

Test

#263

Test

Re: File /ft_301-s(jp).pdf uploaded #file-notice

#261

i put google translate on my smartphone, selected japanese to english translation. pointed camera to text and out pops english !!?

Re: rf unit pb1433 noise problem and no rf output. need advice

#260

Problem solved. !!? Replaced mixer IC and a couple of diodes. RF board is now working

Re: rf unit pb1433 noise problem and no rf output. need advice

#259
Edited

It takes time for the deoxit to work. now, this morning noise is gone. I tried to measure the output of the mixer Q101 on the good rf board with a scope and I could not see anything. Dont know why. I ordered a new mixer for the bad rf board hoping that will solve the no rf output. Q104 has little output on the bad one but high output on the good one. I tried peaking the trimmers for T1 but on the good radio they have no effect on the output power. The capacitor bank for T1 is for receive. There is a mistake in the schematic. In the schematic I have rx in and tx out are connected togather so I need to go back and re-tweek the RX trimmers

rf unit pb1433 noise problem and no rf output. need advice

#258

pb1433 rf board output of Q104 board pin 14 going into t3 is a beautiful sine wave. output of t3 going to board input pin 15 is trashy noisy. I sprayed the band selector wafers with deoxit and gave it a good workout but it is still the same. dirty signal.
what can i do to fix this?? Is the noise caused by the resistors??
The board produces no tx output. SN7400 output is good, Q106 swapped out with a good one, rf no output, Q105 replaced with a good one, no output.
removed Q105 and q106. Placed good rf board and bad one side by side and ohmed it out compairing readings and are reading identical.I am at a loss, it should work but does not. !!.

anyone with RF board experience advice would be greatly appreciated.

Thanks, Robert KH2BR

?

Re: Vox Unit PB1438

#257
Edited

Problem solved
I have the vox board working now. I changed the circuit a little. Now, the MC14011 drives a 2n2222 which in turn drives a mosfet, 2n7000.
It works very well now. Q606 is a 2n2222 and Q607 is a 2n7000.. the diode d602 was eliminated. We will see

Re: looking for parts. FT301s analog face plate and PB1433 rf board

#256

I replaced the receiver mixer and receiver amp mosfets and now the receiver section works. for tx, there is 240 mv of rf output. input to q105 is 95mv. have to check the protection circuit now. SN7400 and Q106

Re: looking for parts. FT301s analog face plate and PB1433 rf board

#255

It was no rx.. didnot test tx

Re: looking for parts. FT301s analog face plate and PB1433 rf board

#254

开云体育

Was it no TX or no RX or both?

Show quoted text

On Oct 27, 2022, at 5:39 PM, Robert Holsti <kh2br.w6@...> wrote:

?i swapped it out with a good one and the good one makes the receiver work.
I have 2 mosfets on the way. I swapped out one mosfet that had a socket to mount it in and that didnt work. the other one is soldered in and didnt want to replace that one until new ones arrive.? This radio has multiple problems and I like the pain !!!? :)

Re: looking for parts. FT301s analog face plate and PB1433 rf board

#253

i swapped it out with a good one and the good one makes the receiver work.
I have 2 mosfets on the way. I swapped out one mosfet that had a socket to mount it in and that didnt work. the other one is soldered in and didnt want to replace that one until new ones arrive.? This radio has multiple problems and I like the pain !!!? :)

Re: looking for parts. FT301s analog face plate and PB1433 rf board

#252

开云体育

Hi Robert,

Are you sure that you have an issue with your RF board?

Mike

Show quoted text

On Oct 26, 2022, at 4:05 PM, Robert Holsti <kh2br.w6@...> wrote:

?
I am looking for a analog ft301s face plate and a PB 1433? RF board?

Thanks, Robert KH2BR

looking for parts. FT301s analog face plate and PB1433 rf board

#251

I am looking for a analog ft301s face plate and a PB 1433? RF board?

Thanks, Robert KH2BR

Re: New owner of a project 301D

Bob Isselhard

#250

James:? Do you have the item # or the seller's name?? I looked on Ebay just now and don't see this replacement display.? I'd like to buy one.? Thanks.

Re: FS FT-301D package

#249

开云体育

Hi Richy,

I’m interested give me a price for all.

Thanks,

Michael?

Show quoted text

On Oct 16, 2022, at 12:05 AM, Richy Russo via groups.io <ss409ss@...> wrote:

?
?

? Hi Rich here,

? I have an FT-301D package for sale. I’ll never get around to repairing it as I don’t have the time nor patience anymore.

It consists of a FP-301D ?with the ID option and clock, that appears to work. The FV-301 external VFO untested, the YO-301 Monitor Scope (appears to function) and the FT-301D. The radio does not RX or Tx, but does turn on and the vfo tracks and band changes reflect properly. One small segment on the display is out and the light behind the meter is out. No mic included, the power supply has the cinch Jones on it. A matching
phone patch is included as well but Is not shown. Make an offer plus shipping to my QRZ email or come pick it up in central Florida. Can meet within reason. I don’t want to break this up if I can avoid it. A reasonable offer and it’s yours, as always trades considered lol.

Thanks Richy N2ZD?

? ?Consider this for the options, parts value or repair it.?