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Re: Location of FH2 Ft101ZD MK3

 

OK... How much do you want for it?

On Tue, Jul 19, 2022 at 9:50 PM N0EE via <n0ee=[email protected]> wrote:
Thanks for the reply. That is where I've been looking, nothing that resembles a fuse or fuse holder in this tank cage that I see on the bottom.? There is a 3pos terminal strip mounted inside the back panel by the receive antenna jack with what looks like a diode/lamp on the bottom but one end goes to chassis ground so to me that isn't it.?? I do see what looks like a lamp but it's mounted outside the final cage near the transformer. The SO239 center goes directly to an inductor that is connected to the relay.? I need a picture...? I didn't buy this rig to work on it, I'm going to spend maybe another hour on this jewel then off to market she goes.... Looks great with rated power out.

Re: FT-101E Signal Generator is off frequency

 

Plus, you have to adjust the 500KHz back dial of the VFO every time you switch from LSB, USB or CW... relative to zeroing your market generator.?
Re: FT-101E Signal Generator is off frequency

 

Since the span between LSB and USB is about 2.8KHz, I suspect your 25KHz and ?100KHz points are just about right and the error factor is probably much less than 50-100Hz off.?
And the 601 is no way as accurate as a real, but even inexpensive, frequency counter. ?
Re: Location of FH2 Ft101ZD MK3

 

From the service manual -?

"The RF input signal from the antenna is fed through antenna relay RL2, lamp fuse FH2, attenuator switch S2004 (located on the lever switch unit...)"

So trace the line from the antenna connector to the relay.? One of the other relay connections will be to a small clip-in holder for this:


It's a good bet that if the rig was turned on near another transmitter while it was being keyed that this has blown.? If your TX is good, the Calibration signal is over S9 but the receiver seems deaf, this is the most likely culprit.

HTH,

73 de Chuck, WS1L



On Tue, Jul 19, 2022 at 11:50 PM N0EE via <n0ee=[email protected]> wrote:
Thanks for the reply. That is where I've been looking, nothing that resembles a fuse or fuse holder in this tank cage that I see on the bottom.? There is a 3pos terminal strip mounted inside the back panel by the receive antenna jack with what looks like a diode/lamp on the bottom but one end goes to chassis ground so to me that isn't it.?? I do see what looks like a lamp but it's mounted outside the final cage near the transformer. The SO239 center goes directly to an inductor that is connected to the relay.? I need a picture...? I didn't buy this rig to work on it, I'm going to spend maybe another hour on this jewel then off to market she goes.... Looks great with rated power out.

FT-101E Signal Generator is off frequency

 

Hi,
? ?I'm new to FT-101 world but am really enjoying it.? I recently got an FT-101E and have done a lot of work getting it to work properly.? I've recapped the entire thing, performed the clarifier and tx/rx adjustment procedures, cleaned all of the internal contacts, etc.? It transmits and receives great and sounds good, so in terms of working properly, all seems to be well.? I do have a couple of minor things that I'm wondering about though.? First thing: part of the tx/rx alignment procedure is to make the voltage match between RX and TX (using Mox) with the Zero Set pot on the high voltage board.? When I read the voltages during receive and transmit, they're so far apart that the pot doesn't have enough adjustment to make them match.? I have checked TX on a separate radio, and it seems to be aligned with RX fine.? I've also made numerous stateside and DX contacts and haven't had any trouble there.? Is this a problem?? If it is, what can be done to correct it?
? ?Second, and more importantly: when I zero beat using the 25KHz or 100KHz signal generator, the frequency that I've corrected to is about 1.4KHz down from the actual frequency.? By that I mean: if I zero beat at 14.300MHz using the 100KHz signal generator, I'm actually at 14.2986MHz.? The 25KHz and 100KHz generators seem to be off by slightly different amounts too.? I have a YC-601 frequency counter so I can account for the discrepancy by calibrating the meter/dial down 1.4KHz to match the actual frequency, but I'm wondering if there's a way to adjust the signal generator to be dead on.? I haven't found any YouTube videos explaining this, and I don't see anything referencing it in the service manual.? This isn't too big of a hindrance since I know what's going on, but it would be nice to have it "right."? My assumption is that something has drifted due to age and it's something that I'll just have to get used to.
? ? Thanks in advance.

Scott
Re: Location of FH2 Ft101ZD MK3

N0EE
 

Thanks for the reply. That is where I've been looking, nothing that resembles a fuse or fuse holder in this tank cage that I see on the bottom.? There is a 3pos terminal strip mounted inside the back panel by the receive antenna jack with what looks like a diode/lamp on the bottom but one end goes to chassis ground so to me that isn't it.?? I do see what looks like a lamp but it's mounted outside the final cage near the transformer. The SO239 center goes directly to an inductor that is connected to the relay.? I need a picture...? I didn't buy this rig to work on it, I'm going to spend maybe another hour on this jewel then off to market she goes.... Looks great with rated power out.
Re: Location of FH2 Ft101ZD MK3

 

If I recall correctly you take off the bottom cover and the bottom screen over the finals compartment. Trace the coax center line back from the PL259 jack an inch or two and you will see what looks like a glass fuse in a holder. That is the lamp fuse.?

I’m away from my notes so doing this by memory and I could be wrong.?

GL!

73 de Chuck, WS1L?

On Tue, Jul 19, 2022 at 20:36 N0EE via <n0ee=[email protected]> wrote:
I bought this rig at a hamfest and the seller was less than honest, imagine that... Anyway, it loads up good but no receive, checking out what others suggest.? Specifically where is the Lamp that is designated as FH2? Can someone describe accurately exactly where this lamp is located, or provide a picture? Please, this is the only thing I'm asking, I'm not looking for any other information, I've read all the online suggestions that I have found so far.? All I want to know is where is this Lamp?

--
Chuck Chandler chandlerusm@...
Location of FH2 Ft101ZD MK3

N0EE
 

I bought this rig at a hamfest and the seller was less than honest, imagine that... Anyway, it loads up good but no receive, checking out what others suggest.? Specifically where is the Lamp that is designated as FH2? Can someone describe accurately exactly where this lamp is located, or provide a picture? Please, this is the only thing I'm asking, I'm not looking for any other information, I've read all the online suggestions that I have found so far.? All I want to know is where is this Lamp?
Possibility of Adding AM to an FT-101ZD MK0

 

Is it feasible to add AM capability to a MK0? ?Does anyone have experience with this?

Thank you.

73,
Michael Smith, N4KZO
Re: No output FT-101E

 

Dear Mick

I'm not sure that I understood the complete problem, but if as you say " ALC/Power/IP still show the same readings if its putting power out or not ",
I believe or think that is a relay problem.
The relay in the tube cage commute between Tx and Rx mode.

I guess to see FT-101e schematic to take a overview it?s a good idea.

good luck

Emerson, PP6EW





Em qui., 16 de jun. de 2022 às 14:31, mick smith <michael.newbury@...> escreveu:

Have a problem with a 101E that I think might be heat related,
?
On first start up and warm up it tunes up ok no problem, after 10 mins or so either TXing or sitting idle it stops putting out power,
If I turn it off for 10/15 mins everything is back to normal, then 10 mins later it stops putting out power again,
If I never had a power meter in-line I would be none the wiser as the meters on the radio, ALC/Power/IP still show the same readings if its putting power out or not, lamps still dim slightly also putting out power or not.
Tried a new in-line meter and new driver tube, still the same problem,
Was working fine a few months ago when I last used it, no problem on receive, and this problem is on all bands.
Relays do click when pressing the PTT, saw a small relay in the tube cage, not sure what that one does,
?
Has anyone come across this before, Im ok with changing component’s on a board but pretty useless at fault finding, so if this sounds like something you might know that’s at fault could you please?
Point me in the right direction,

Thanks, Mick, SA4MDN
FT-101 No Power Output- RL1?

 

Hi all,? I Have a FT-101B that no longer produces output power.
RX was and still is very good and stable
It was producing solid power on all bands until a few weeks ago when it went to the bench for alignment and cold neutralization.
While on the bench it seemed prudent to remove boards, clean edge connectors and sockets
I also changed electros on regulator board and a few others.
I started getting a click sound which turned out to be arcing from a loose wire to one of the filter cap terminals.? This took over a week to find but quick solder reflow fixed it.

After which I could dial up 60 mA bias current but there was no output in tune/CW or SSB

The accessories plug is in place, heater filaments are glowing.
C13 has been inspected and no sign of cracking - look fine
RL1 & RL2 both removed, carefully cleaned and replaced
Tried 3 different driver tubes
Still no power out.

I understand RL1 is the cause of many issues and not convinced there is a problem with it or the socket connections
The VFO lamp goes out when PTT is pushed
The relay clicks in and out.
I did note it had to be wriggled around while in its socket or there was no bias voltage?
I don't have another relay handy to just plug in and verify so what checks can I do to check the relays functioning properly
I'm reading up, going through old pages - there was a RL1 file somewhere with all known about it but can't locate that.

Really stuck for the moment but trying to be logical - something in the PA chain at fault?
What else could I measure and check?? I''m no expert but keen to learn while fixing
Re: FT-101ZD MK2 poor sensitivity ..

 

Glad I am not the only one!
Re: FT-101ZD MK2 poor sensitivity ..

 

Well I've been doing this for 40m years... and I don't understand what you mean or what this conclusion is.... LOL


On Sun, Jan 23, 2022 at 9:53 AM Andrew M0KCR <andrewhege33@...> wrote:
Soooooo .... after going back and forth and head scratching and wondering why the Marker Signal goes through but RX is very weak I by
coincidence found out that you have to apply the marker signal with a 50 Ohm terminator.

If I test with a terminator the S-Meter does not move when I dial to 14.2MHz.

So, there you have it.
:)

Re: FT-101ZD MK2 AM BOARD looks odd / modified???

 

Yep, that's just the ticket. Thank you.
Re: FT-101ZD MK2 AM BOARD looks odd / modified???

 

Hi Cuck, very interested in the mod you suggest. All I have seen to overcome the narrow AM audio bandwidth after fitting the 6kHz filter involves fitting a relay to bypass the next, (width filter - 2.7kHz ?), If there is an easier way that's great. Any further info most appreciated. Thank you.
Re: FT-101ZD MK2 poor sensitivity ..

 

Soooooo .... after going back and forth and head scratching and wondering why the Marker Signal goes through but RX is very weak I by
coincidence found out that you have to apply the marker signal with a 50 Ohm terminator.

If I test with a terminator the S-Meter does not move when I dial to 14.2MHz.

So, there you have it.
:)
Re: FT-101ZD MK2 AM BOARD looks odd / modified???

 
Edited

Thank you? ddelectrical,

That's reassuring :)

I also got my AM board to work, it was a mix-up in the coax connectors (there are 2 of them, and they're both grey)
Re: FT-101ZD MK2 AM BOARD looks odd / modified???

 

OK, here are the pages?from the FT newsletter?- it requires swapping pins 3 and 4 on IF Board J03.??

73 de Chuck, WS1L



On Sat, Jan 22, 2022 at 9:01 PM Bruce Collins <kb0tj1@...> wrote:
Post it here if possible.?
I have two MKIII radios and two of these optional AM boards. I’d like to install them correctly myself.?

FT-101ZD AM Filter mod.pdf
FT-101ZD AM Filter mod.pdf

Re: FT-101ZD MK2 AM BOARD looks odd / modified???

 

Post it here if possible.?
I have two MKIII radios and two of these optional AM boards. I’d like to install them correctly myself.?
Re: FT-101ZD MK2 AM BOARD looks odd / modified???

 

There are two pins on one of the IF board plugs that have to be swapped. Pin 3 and 4 of one of them will send all audio but CW N thru the narrow filter slot. CW N will then go through the normal SSB filter.

If you need the exact jack number send me a direct email and I’ll look it up when I get a chance. I found it out when I was reversing the mod to use on CW. I later found it documented in the old Fox Tango newsletters, maybe May of 1985 or so.

73 de Chuck, WS1L ?

On Sat, Jan 22, 2022 at 5:38 PM ddelectrical via <ddelectrical=[email protected]> wrote:
Hi Andrew. I noticed this too on an AM board I have here. I discovered it was done in the factory on later boards due to an earth problem causing hum if I remember right. Each section of the board receives its ground point individually with these tracks cut. Could have been an earth loop problem originally and cured by making the ground arrangement radial with the track cuts. The AM pcb fitted to my FT101ZD mk3 works with the tracks cut like this. It checks out on the schematic too.

After replacing my FM pcb with the AM one I then found that the audio bandwidth on AM is very narrow. It is necessary to fit a wide filter, (Yaesu XF-8.9GA), and modify the set to bypass the width control circuit to get the full 6kHz audio output. I have fitted the pcb and acquired a filter but have yet to do the mod to the width filter. This is a well known issue with the FT101ZD mk3. It may require fitting a toggle switch to the rear panel to switch the width control circuit in or out. I am still researching.

Hope this helps. Doesn't explain why yours is not working however.

--
Chuck Chandler chandlerusm@...
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