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wonder if anyone on the list has a schematic of the ALS-500RC? I don't see one on the MFJ website.

Or , can anyone suggest how to trouble shoot one that doesn't seem to be working with my ALS-500?
Your assistance will be appreciated.
Ray, W4BYG

-- 
"The world is desperate for a faith that combines two things: awestruck sight of unshakable divine Truth, and 
utterly practical, round-the-clock power to make a liberating difference in life"... John Piper

30 M Transceiver, CW Iambic Paddle, Wattmeter
/SWR, Antenna Tuners, Coax switches, HF Antenna,
and more For Sale:

.

MFJ 9030, QRP 30 m CW Transceiver For Sale:

The MFJ-9030 is a 5 watt, 30 m CW transceiver
that is very light and compact.

It has a sensitive super-het receiver that has an
IF filter for great CW reception. The VFO is
smooth and stable; RIT is included.

Built in speaker; Motorola power amplifier
transistor delivers full QRP output and
tolerates opens and accidental shorts
without damage.

It uses little power - only 50 mA average on
receive and 1.2 amp peak on transmit.
Perfect for battery operation.

This one works as it should.
Cosmetically, it is like new, with no scratches
or defects. Buy it with paper work for $165

.

MFJ 564 Chrome Iambic Paddles

This high performance iambic paddle has full
range adjustment of tension and contact spacing,
self-adjusting nylon/steel needle bearings,
machined frame, non-skid feet, and a heavy
Chrome base. They are a clone of the Bencher
BY-2.

This set is immaculate. It looks like they
are new, and in fact they may be. They are
in their original box, with paper work, for
$85.

.
MFJ 816 HF Wattmeter:

The MFJ-816 measures forward power, reflected
power and SWR. The wattmeter measures power on
two scales, 30 Watts and 300 Watts. It is usable
from 1.8 to 30 MHz, in other words, all HF bands.

It measures a compact 4.5 x 2.25 x 3 inches.

This one is NEW, only removed from its box to take
the picture. When MFJ was still in business, they
sold them for $60. HRO still sells them for $56.
Buy this one for $40

.

Both of these are MFJ HF Antenna Tuners.
They work 100% like they should, and
cosmetically look like new, with no scratches.
Both include instruction manuals.

MFJ 901 B
Black enclosure.
160 thru 10 m, at 200 Watts according to MFJ.
They say it's designed to match virtually any
transmitter to almost any antenna.
SO-239 connectors in and out on back panel.
Includes built in 4:1 balun. $100

MFJ 16010 ST
Same electrically as MFJ 901 B, but in a nice
deluxe woodgrain TenTec enclosure. $90

.

Two Position Coax Switches:

I have some 2 position coax switches available.
They all are of the "strip line" construction,
which means they operate fine thru VHF frequencies.

MFJ 1702 B

This switch actually has three positions, with the
middle position grounding both SO-239 connectors.
Antenna Switch Connector Type: UHF female, SO-239
Switch Impedance: 50 ohms
Switch Insertion Loss: Less than 0.20 dB
Switch Port Isolation (Crosstalk): More than 60 dB
Power Rating (0 to 30 MHz): 2,500 W PEP/1,000 W CW
This one works just like it should. Buy it for $25.

.

MFJ 1704 Four Position Coax Switch:

The MFJ 1704 is a four position coax switch designed
for use in 50 ohm high frequency systems -- up to 500
MHz. In addition there is a replaceable lightning surge
protector that helps protect against distant lightning
induced surges and static.

The center position grounds all antennas.
It handles 2.5 kW PEP with extremely low SWR.
Isolation is rated better than 60 dB at 30 MHz
and better than 50 dB isolation at 500MHz.
Negligible insertion loss.
SO-239 connectors.

This one works fine, is in its original box, and
looks very close to new.
Paper work is includes for $75.

.

MFJ End Fed Wire Antenna:

End-Fed Half Waves(EFHW) antennas cover multiple bands
without traps, stubs, or resonators. They have
the unique quality of resonating on the 1/2-wave
fundamental frequency plus odd/even harmonics
above!

FULL HF Coverage, no tuner needed on most frequencies.
No long counterpoise, radials or feedline required.
Rugged weather-resistant 50-Ohm matching network.
Fast Setup and takedown.
Easy Storage/transport.
Stainless Hardware, UV resistant materials throughout.
300 Watts PEP power handling.

Typical 2:1 SWR Span
80M 3.65/1.1 3.5-3.9
40M 7.19/1.4 Full Band
30M 10.8/1.3 Tuner Required
20M 14.3/1.3 Full Band
15M 21.25/1.1 Full Band
10M 28.2/1.0 28.0-28.80

It is NEW, still in its original packages.

MFJ 1982 MP
Covers 80 thru 10 m. $85

.

MFJ-1313 Wall Wart
12 V DC at 100 ma, 2.8 mm plug; $14

.

I also have many other accessories available such as many
different types of microphones, HTs, VHF and UHF rigs, HF
and VHF/UHF antennas, connectors, miscellaneous accessories,
etc.
Just too many to list here. Please e-mail your requests.

.
Prices do not include shipping from Florida.


Thanks.

73,

Ken, W8EK

Ken Simpson
E-mail to W8EK@... or W8EK@...
Voice Phone (352) 732-8400





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Upon power up switch goes into tx.. saying the tx light comes on.. not sure if it really goes into tx did not hear any relays clicking.. Help?? Skip

Ken,
After I replaced the coax connector ( which did make a difference) I added several Ferrite Mix 31 snap-ons from Palomar Eng. I think all issues were resolved after a few were added but I know all issues are resolved now.
I suspect the reason it was more noticeable after I started using the MFJ-998 is because I get a better tune with the MFJ-998 and can TX at a higher power than before.

73 Mick VA3EPM

Don't know when you posted you problem, But I have a MFJ-986 whish has a similar problem.
I normally work 80 mtrs so have not noticed it on other bands. I run it with a Heathkit Warrior HA10 usually about 500watts.
I noticed it causes my computer to freeze when using a websdr KFS in Half Moon Bay CA. Also my HP Office Jet printer comes alive and starts selecting different menus. With the amplifer not keyed but still passing RF thru the tuner it messes with the printer occationally. With everything staying the same except removing the MFJ-986 tuner and putting my Heathki SA-2040 tuner in place there is no interference. grounding does not change anything with either tuner. Recap... MFJ-986 500 watts interference, Heathkit SA-2040 no interference. I am using ladder line to feed the antenna. Both tuners give same SWR. ?Any suggestions besides connectors?
Thanks, Ken N6BSS

While I have time on my hands, I decided to get around to installing bits I've purchased over the last couple of years. I've hit a snag on the MFJ 1263 radio/microphone switch. I've managed to get it partly working. It works with (Radio A) the Yaesu FTDX101D, Heil Pro 7 head set (Mic 1), and Yaesu M-100 Desk mic (Mic 2).
I can't for the life of me figure out how to get it to work with (Radio B) a Yaesu FT847.
It should be the stock pin set, but it's not?.
I've tried every pin set in the book and found a few others online.
One came close where it keyed up, but the Mic wouldn't work. Another would toggle through memory channels when ptt is pushed.?
I even got through to Jimmy in MFJ, and he's at a loss, too.?
If you have any ideas on the 847 Pin set, please share.?

Do you mean MFJ Enterprises is defunct as for equipment sales, but service on units is still available...

--
Sent from my Android phone with Mail. Please excuse my brevity.

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Anybody been able to get thru to service?? All I get is a busy signal.

Hi Donald,
Yes, I expect that if I hadn't retighten it the RF would have re-appered. At the time I had hand tightened it and knew it was loose. I figured with pliers and a really good tighten the problem is permanently gone... not the case and I'm glad it failed this way. I've since cut off the connector and replaced it, There now seems to be no RF issues, and the old connector ground was corroded and didn't seem to have a proper ground connection. The Airporne 10 cable is still in the plan but it's waiting for a new beam antenna. I'm thinking of replacing my Alpha delta DXCC dipole with an MA6B mini yagi. not 100% sure that's what I'm going to do yet. I am limited to a roof top antenna and the MA6B is about as big as I can go. I even think a hex beam is more that what would be acceptable.
73 Mick VA3EPM

Mick . . .

On Thu, 04 Apr 2024 11:02:52 -0700, "Mick" <Va3epm@...> wrote:

. . . so I checked that, it was a little loose. After tightening it the problem was gone, So I tightened some more (with pliers) and the problem is back.

Sounds like you found the intermittent fault. I wonder if you hadn't tightened
it some more if you might have thought the problem was a simple tightening
problem and later on had the same problem reappear?

So you'll get to use some of your M&P Airborne 10 now. :-)


Donald KX8K



----------------------------------------------------
Some ham radio groups you may be interested in:
/g/ICOM /g/Ham-Antennas
/g/HamRadioHelp /g/Baofeng
/g/CHIRP

Garry, Jeff,
Again thanks for the feedback.
I decided to start eliminating all possible sources, so I removed the tuner, still an issue (thankfully because I like my 998) then bypassed all accessories (one by one including cables) and directly routed the output of my FT-991a to my antenna (still a problem) but there is a coax coupling in the line (to the antenna) so I checked that, it was a little loose. After tightening it the problem was gone, So I tightened some more (with pliers) and the problem is back.
I do think it is the source, I doesn't look "clean" , I'm going to cut the connector off and replace it until I have time to replace the cable with one that is long enough to not need a coupling. I have a new roll of M&P Airborne 10 calling out "Use Me"?
So I think Jeff you were correct in your assessment. When I finally replace it I'll post again hopefully with my success.
73
Mick VA3EPM