Yaesu 840 EFLW 1.5 swr tuned no tx but rx

[Humblehero666]

I'm fairly new done plenty of research and stumped hard on this.... ft 840 EFLW 98.5 FT
COUNTERPOISE 14 FT not grounded. 1.5 swr on 10 meters no one can hear me. Voltage checks out 30 amp new power supply mic gain up. Z 100 plus tuner any help is appreciated

 

[techman210]

If you're feeding the antenna with coax (what type? How long?) this is likely your problem. I deally, a non-resonant antenna should have the tuner at the base of the antenna. As they say with a setup like this "the antenna starts at the output of the tuner"

 

[Humblehero666]

Rg58 3 ft jumper from HRO could the tuner radio and power supply be too close? All I have are 3 ft jumpers. I was able to get a hf net this morning heard 3/4 of it. Then loud buzzing took over and signal was gone.

 

[mass-man]

Probably not a case of being too close, but any noise from the power supply could be going to the rig via the power LEADS. Is your power supply switching or linear? I just retired a switching supply cuz it was creaating havoc with my HF rig. what band were you hearing the net on this morning! 40mtrs is terrible until almost dark for me. Loud buzzing sound indeed.
Sadly interference is tough for many of us...that loud buzzing could have been an appliance coming on in your house...or a neighbor firing up something. My garage opener destroys 40 here...have to turn off the breaker to work 40!

 

[Humblehero666]

Mfj4230mvp power supply. I'm feeling like I goofed something up. I followed instructions to a T. So I must have put something on wrong or have something pushed in that shouldn't be. It is a switching power supply.

On another note I'm running the tuner and the radio on the same power supply uh oh lol
Net 3.982 central MA

 

[techman210]

No- the length of coax between the tuner and antenna. Coax has too much capacitance to run long distances in this application.

Again, "the antenna starts at the output of the tuner"

 

[Humblehero666]

3 ft coax

 

[K7MEM]

I'm fairly new done plenty of research and stumped hard on this.... ft 840 EFLW 98.5 FT
COUNTERPOISE 14 FT not grounded. 1.5 swr on 10 meters no one can hear me. Voltage checks out 30 amp new power supply mic gain up. Z 100 plus tuner any help is appreciated

It doesn't sound like there is any real problem with your setup. Yes, it would be nice if the tuner was right at the feed point, but that isn't always doable. 98.5' is a good length, assuming that you have a 9:1 transformer at the feed point. That length should be able to be used on 160-10 Meters with a local tuner. A SWR of 1.5:1 is not great, but usable. It shouldn't cause any damage to your radio. There will be some loss, but it shouldn't stop you from making a contact. I have worked with much much worse. As long as the meter on your radio is showing output power when you talk, you are getting something out.

There also shouldn't be any problem with using the power supply for both the radio and the tuner. The MFJ-4230mvp is a good power supply. A friend of mine used a MFJ-4245MV with his FT-991A, and all accessories, and never had any issues. Those supplies seem to have very low noise, even though they are switchers. I use a old ICOM PS-15 (analog) with my IC-735 and all my radio bench accessories. The accessories don't require a lot of power. Although, you might need a few ferrites to keep RF out of the accessories.

10 Meters can be a tough band sometimes. While propagation is generally good lately, that doesn't mean it is always good. During previous "propagation good times", I have worked cross country (Arizona to Maryland) while mobile using only 5 watts (HTX-100). What time of day are you trying to operate? 10 Meters is generally a daylight band. I have had my best luck during the afternoon to early evening. When the sun goes down, the band closes up. That's OK for me. I'm not a night owl anyway.

Sounds to me like you just need patience. I have had many times when I called CQ for hours, and never had a single contact. Other times it was like shooting fish in a barrel.

 

[Humblehero666]

I appreciate your post and agree. I think it's timing as well. I'll have to wait for the bands to open up and see if something different happens.

Usually I try 5pm to 10pm sometimes mornings. I'll probably start with a new antenna first.

I moved the power supply away from the setup same results. Hopefully I can have a friend drove thru my city and see if he can here me. It pushes 100 watts. So I was expecting to atleast be able to call cq.

Being a new ham there's lots to learn still. So in open minded and studying for the general!!!

Thanks for your reply.

 

[popnokick]

I'm fairly new done plenty of research and stumped hard on this.... ft 840 EFLW 98.5 FT
COUNTERPOISE 14 FT not grounded. 1.5 swr on 10 meters no one can hear me. Voltage checks out 30 amp new power supply mic gain up. Z 100 plus tuner any help is appreciated

How do you know "no one can hear me"? A lot of guesswork going on there.
Why not eliminate the guesswork and know EXACTLY what stations are hearing you and at what signal strength? All you need to do is operate in FT8 mode using WSJT-X software and put out a few CQ calls. Then go to this website and put in your callsign and you'll get back a map of the world showing what stations are hearing you and where... and they don't even have to answer your CQ! -
Display Reception Reports
This is a great way to check out your radio and antenna setup to see if you're "getting out". With the 840 you'll need an external sound card modem device such as a DigiRig, West Mountain Radio RigBlaster, or Tigertronics SignalLinc. And of course your computer with a USB cable to the digital modem device.

 

[Humblehero666]

Thank you for the great ideas. I will update once I get the items in the mail & hook them up. Meanwhile I will still keep calling probably early am instead of pm.

 

[Humblehero666]

Update! Someone heard me and responded and repeated my call back 3x. But all I could get was Kilowatt Ecko *static sounds* sierra... So possibly just an antenna issue. I cranked up the mic gain and TX power. Not sure if that matters but the meter went over to 40+ while I was talking. So I'm optimistic that I'm just a noob and need patience.

 

[mass-man]

Be careful, cranking up the mic gain can garble your audio!
It really is all about pstience…

 

[wyShack]

A 98 foot wire is going to be directional off the 'far' end on 10 meters. That is most of the signal is going out the end away for, the coax. Is there anything there to hear the signal? (may be lower than the other end so signal is going to ground, or if higher signal may be going up or such direction as no one is 'there'). Throw up a 10 meter dipole, get it 15 feet or more up and have fun.

73

 

[Humblehero666]

This was something I didn't know. !!!
Thanks

 

[Humblehero666]

Putting up a M105C THIS WEEKEND!!!

 

[Humblehero666]

How do you know "no one can hear me"? A lot of guesswork going on there.
Why not eliminate the guesswork and know EXACTLY what stations are hearing you and at what signal strength? All you need to do is operate in FT8 mode using WSJT-X software and put out a few CQ calls. Then go to this website and put in your callsign and you'll get back a map of the world showing what stations are hearing you and where... and they don't even have to answer your CQ! -
Display Reception Reports
This is a great way to check out your radio and antenna setup to see if you're "getting out". With the 840 you'll need an external sound card modem device such as a DigiRig, West Mountain Radio RigBlaster, or Tigertronics SignalLinc. And of course your computer with a USB cable to the digital modem device.

Got the digirig now having a fun time setting it up lol. Can't get it to do anything. Will be watching some videos tonight!

 

[RidingDownUnder]

Hi,
did you buy the unun? If so what brand and model. Did you make the unun, if so what type of toroid did you use and how many turns. Also if you made it how many toroids did you use and what output power do you use on SSB and do you intend to use FT-8 or any digital modes.
Look at the chart below for recommended wire lengths for a 9:1 unun. (Unbalanced to unbalanced)

 

[Humblehero666]

I tried

Hi,
did you buy the unun? If so what brand and model. Did you make the unun, if so what type of toroid did you use and how many turns. Also if you made it how many toroids did you use and what output power do you use on SSB and do you intend to use FT-8 or any digital modes.
Look at the chart below for recommended wire lengths for a 9:1 unun. (Unbalanced to unbalanced)

View attachment 142271

I tried using the Maco m105c 10 meters got nothing. Being a text I can only rx not TX on most bands. I have a ft840 yaseu. Tonight I'll switch to the EFLW 98.5 FT WITH ground to the main bridge. FT8 amd ssb are mu goal . I have the 9:1 Red box.

 

[RidingDownUnder]

I don’t want to confuse you, but EFHW or EFLW needs a 1:1 choke to help choke off QRN (noise) and RF running back down the coaxial cable. Below is a chart you should take a snap shot off and once you have your antenna sorted out you can read up on 1:1 chokes.