Anytone 6666

[Littlecloud319]

Hi, im looking for an antenna that will work good with all bands on this radio with low swr. The antenna needs to attach an nmo mount. Also where can i find the programming software?

 

[chief21]

The AnyTone 6666 is a 10-meter rig. It's not hard to find an antenna for 10 meters, but most probably wouldn't have an NMO base because of their larger size. One exception is the Larsen NMO-27... a base-loaded whip antenna.

 

[Littlecloud319]

The AnyTone 6666 is a 10-meter rig. It's not hard to find an antenna for 10 meters, but most probably wouldn't have an NMO base because of their larger size. One exception is the Larsen NMO-27... a base-loaded whip antenna.

I have a larsen nmo27c currently but i have it tuned with a 1.2 swr for 11m. When i hook it up to this radio and tune to a 10m frequency the swr is 5+. Im looking for something that can have a low swr in both, by low i mean >2.

 

[K4EET]

Hi @Littlecloud319, you are looking for a single antenna that will cover both 10 Meters and 11 Meters with an SWR of less than 2:1 over both bands. That is a bandwidth of 29.7 MHz (top end of the 10 Meter band) minus 26.965 MHz (bottom end of the 11 Meter band) which is a 2.735 MHz spread. A single antenna is going to be hard to find that can do that spread and has an SWR of 2:1 or less across that spread. The antenna would need to be specifically designed for 10 Meter and 11 Meter operation. I don't believe that antenna exists.

What you might be able to do is take two antennas, one specifically for 10 Meters and the other specifically for 11 Meters, and run them through a duplexer to the radio. The duplexer cavities are going to be very large and will need to be home brew since a commercially built duplexer probably does not exist. Then the question remains can you even do that to cover a 2.735 MHz bandwidth with a less than 2:1 SWR. The answer is probably not. You may need four antennas, specifically cut to certain band segments, and run that through a quadplexer. Now we are getting into the "may not be feasible" zone.

Sooooooo... The short answer is it would probably not be feasible to construct such an antenna system.

It would be simpler to run the Anytone 6666 on 10 Meters to a 10 Meter antenna and have a second radio for CB and run it to its own CB antenna. Even at that, staying within a 2:1 SWR across all frequencies in the 10 Meter and 11 Meter bands, may not be possible.

Bottom line? Your specified design criteria is going to be tough to meet. A single antenna that covers the 10 Meter band (28.0 to 29.7 MHz) which is a 1.7 MHz split may not have an SWR of 2:1 or less across that spread. For the CB frequencies (26.965 MHz to 27.405 MHz) which is a 440 kHz spread, a single antenna could probably meet the requirement of having less than or equal to 2:1 SWR.

I hope all of that makes sense. It is 3:45 AM in the morning and I am a tad bit sleepy. LOL!

73, Dave K4EET

 

[jwt873]

As K4EET points out, there really isn't a single antenna that will effectively cover 10m and 11m. One option would be to use a tuner. Z-100 Plus - LDG Electronics

The Anytone 6666 is essentially a CB radio. (It can be easily switched between CB and ham mode by clicking a few buttons on the front panel). If you're going to be using the radio for ham and CB use.. Just buy two NMO27C antennas. Cut one for CB and the other for 10 meters. Then, swap them out as required. Not the most convenient method, but the easiest.

 

[chief21]

If you're going to be using the radio for ham and CB use.. Just buy two NMO27C antennas. Cut one for CB and the other for 10 meters. Then, swap them out as required. Not the most convenient method, but the easiest.

A coax switch would make this faster and more convenient.

 

[chief21]

Every link I've tried for the software from a Google search results in a warning page.

I found some notes and links to the software for the AT-6666 at Simonthewizard.com, but those links appear to be dead. Perhaps you could enter a query at his web site?

 

[alcahuete]

A coax switch would make this faster and more convenient.

If you want two antennas on your car simultaneously, yes.

 

[prcguy]

What the OP needs is a Laird/Antenex CW27, which is NMO and rated for 26.8 to 29.7MHz continuous with low SWR. The whips are very long at 67.5" and they work great and handle up to 200 watts. I believe these are discontinued but they show up on Ebay and other places now and then. I picked up two over the years and love them.

 

[mrweather]

The CW27 seems to fit the bill but they are discontinued. Not sure if the OP has the patience to hunt for a used one.

 

[Littlecloud319]

I think just going to use it for 11m for now. Does anyone know the way to put it in 11m mode?

 

[hypersight]

If you can get your hands on a Larsen NMO30 coil and Larsen 64" whip. Using the 64" whip on this coil makes it work very well from 26 to 28 MHz. I have been running this setup for years now. It gets out! I have it mounted smack in the middle of the roof on my sedan. I will attach a pic of an SWR sweep from my analyzer.

 

[prcguy]

That won't cover CB and 10m with a good match without retuning.

If you can get your hands on a Larsen NMO30 coil and Larsen 64" whip. Using the 64" whip on this coil makes it work very well from 26 to 28 MHz. I have been running this setup for years now. It gets out! I have it mounted smack in the middle of the roof on my sedan. I will attach a pic of an SWR sweep from my analyzer.

 

[tweiss3]

Hamstick/HamTenna (MFJ 1610T) is very wide band, and has been used for both 10m and 11m without retuning.

 

[K4EET]

Hamstick/HamTenna (MFJ 1610T) is very wide band, and has been used for both 10m and 11m without retuning.

Not wanting to get @Littlecloud319 too hopeful here, I have attached the MFJ "manual" for this antenna. There is a note that states:

NOTE: Bandwidth and VSWR will vary due to mounting location. Roof mounts, trunk groove mounts, and trunk lip mounts are recommended. The poorest mount is a bumper mount. If your installation has a VSWR over 1.5:1 at resonance or you need to operate over a greater bandwidth, a tuner may be required.

While that note lacks specifics in the way of measured SWR to a frequency and then plotting the SWR curve (or use an Antenna Analyzer to make life easy), it begs for additional information.

Referencing my first response in Post #4 above, I stated:

Hi @Littlecloud319, you are looking for a single antenna that will cover both 10 Meters and 11 Meters with an SWR of less than 2:1 over both bands. That is a bandwidth of 29.7 MHz (top end of the 10 Meter band) minus 26.965 MHz (bottom end of the 11 Meter band) which is a 2.735 MHz spread. A single antenna is going to be hard to find that can do that spread and has an SWR of 2:1 or less across that spread. The antenna would need to be specifically designed for 10 Meter and 11 Meter operation. I don't believe that antenna exists.

While the MFJ-1610T might be able to have some of the 10 Meter and 11 Meter bands covered with a reasonable SWR, I seriously doubt that it can cover the 2.735 MHz spread at a SWR of 2:1 or less without retuning or using a tuner (as the note in the MFJ-1610T manual states). A quarter-wave stub at the two frequencies cited above would be:

29.7 MHz (top end of the 10 Meter band) ----------> 7.88 feet
26.965 MHz (bottom end of the 11 Meter band) ---> 8.68 feet

That is a difference of 0.8 feet or 9.6 inches. Just with the sheer length difference of 9-5/8th inches, one could almost visualize that a quarter-wave stub cut to the middle of the spread or (7.88+8.68)/2 = 8.28 feet or 8 feet 3-3/8 inches needing to be adjusted ± 4-13/16th inches to the theoretical match points on either side is probably not going to exhibit a 2:1 SWR or less across that frequency spread; i.e. bandwidth.

Possibly, just maybe, a 2:1 SWR or less could be achieved over the entire CB bandwidth and picking up the low end of 10 Meters for CW operation but that is still stretching things a bit.

Bottom line? I just don't see any single antenna covering both the 10 Meter and 11 Meter bands with a 2:1 SWR or less across the entire spread if re-tuning the antenna length and/or the use of an external antenna tuner is not permitted.

Fortunately, the OP has decided to stick with just one band for the antenna in question.

73, Dave K4EET