Yaesu FT-101E no transmit, no i.c.

[KneeBiter]

And you won't have any issues plugging the board in. Not much to go wrong on it that could mess anything up.

 

[Champo]

Thanks KneeBiter. That's what I get for typing that out so quickly. Mode is what I meant but definitely not what I typed lol!

 

[Champo]

And you won't have any issues plugging the board in. Not much to go wrong on it that could mess anything up.

That's what I was hoping for. It will make life a lot simpler. Plus having the unmodified board is a plus. My soldering skills are good enough for government work but probably best left from modifications that aren't absolutely necessary lol!

 

[nomadradio]

You need to modify the mode switch to use the AM filter.

The upper slot where the accessory filter goes is wired to the "CW" position of the mode selector. When an AM filter is present in a radio with a stock mode selector, you'll hear the pitch of the receiver noise much higher than the way the noise sounds in sideband modes when you switch to CW. And the sound of AM will be unchanged, just like it was with the top filter slot empty.

Pretty sure the mod to make the accessory filter activate for AM mode is posted at foxtango.org. It's in the Yaesu service manual. Involves moving around wires and one end of a diode IIRC.

73

 

[Champo]

Well I found out my issue wasn't with the driver tube after all but rather with the tube socket in some capacity. I added the AM filter and rewired the mode switch yesterday. During the process of turning the rig over I slightly bumped the driver tube....and I mean slightly (case was off). Anyways I put her back together and fired her up. Let her sit for 45 minutes before I began the tuning process and then I experienced the same problem as before. No amount of jiggling or wiggling the tube changed anything. So, I killed the heaters momentarily and pulled the driver and replaced it with the original. I turned the heaters back on and let it sit for 5 min and then began to tune and it worked just as it should. Should I spray DeoxIT in it? Do the think the socket is damaged? Your thoughts would be appreciated

 

[KneeBiter]

Clean with Deoxit. Use a dental type pick and push the terminals a bit to see if you can tighten them. Buff the tube pins a bit and get them to shine.

 

[Champo]

Will do!

 

[nomadradio]

Don't use any kind of abrasive on the surface of the tube socket's spring contacts. Brush, solvent, compressed air won't damage the plated contact surfaces. Abrasives will.

Don't forget to swab the pins of the tube for schmoo as well.

73

 

[David K. Aldridge]

Unfortunately there's no one near me that I'm familiar with that has access to a tester. I picked up a weak but functional set of PA tubes that arrived today. Figured it would be a good idea to have a cheap set for testing if nothing else. A known quantity as opposed to an unknown one. I don't have a spare driver tube though so it isn't all daisy's. The tubes in the radio are original...well Toshiba's anyways. The weak set I have are US made. I read there is a cap replacement necessary for neutralization but I figured, even without that, it'll still give me an understanding of where the problem lies while only potentially damaging cheap tubes. I'll run that test here in a few. Thank you for the pointers.

I'm sure I'm not asking you this in the right place, but I have a 101FE. After tuning it up per listening on my 690S...Receive is fine, good IC reading on rigs meter, good tubes, relays cleaned and even swapped for a spare set here, good 80pf installed C13, tuned up in tune mode... shows .1V at the RF out connector on rear. It has very good sounding SSB audio in xmit, tone as well in CW, But no output, low enough my wattmeters show nothing. Help please. Davidaldridge8@hotmail.com WM5M

 

[nomadradio]

If you have a good bias reading on the finals, the next place to look is the driver tube. There are two power resistors under the deck, just to the rear of the driver tube's socket, a 7 Watt and a 5 Watt. You have to remove the metal shield cover and the trimmer-capacitor circuit board to see the underside of the driver tube socket. If the smaller one of the two resistors fails open, you'll have zero Volts on the screen grid of the driver tube.

And zero RF power or close to it.

73