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Opek Technologies

★ 1.0 (1 review)ยท40 productsยท$10.95 โ€“ $154.95
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40 products ยท3 sold out ยท8 discontinued ↓
HVT400B80M 80M/ 40M / 20M / 15M / 10M / 6M / 2M / 70cm Meter Ant
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Opek Technologies HVT-400B
Opek HVT-400B 8 Band HF/VHF/
  • Multiband: Covers 80 / 40 / 20 / 15 / 10 / 6 / 2 meter and 70cm
  • UHF Connection
  • Retractable Telescopic Whip for Improved Tuning
$79.95 $89.95Save $10.00
In Stock
Currently unavailable ยท 3

Opek Technologies questions

Is there continuity between the outer barrel on the SO-239 and the inside threading on the NMO?

Yes, verified 9/16/2024 that the SO-239 outer barrel has continuity to the bottom NMO threaded side. The center conductor has continuity as well.

How do I check my SWR using this meter?
From OPEK's Manual:

1. Turn the transmitter of and disconnect the antenna coaxial cable at the output.

2. Connect the SWR-3 โ€œTRANSโ€ connector to the transmitter output, and โ€œANTโ€ to antenna connector. As short cable equipped with male connectors on both ends will be required between the transmitter and the meter.

3. Set the slide switch to โ€œSWRโ€ and โ€œFWDโ€. Rotate the โ€œSET & FS ADJโ€ counterclockwise to near minimum position.

4. Turn the transmitter on, rotate the โ€œSET & FS ADJโ€ for full scale, โ€œSETโ€ position on meter.

5. Next, set the slide switch FWD/REF to โ€œREFโ€ and read the meter scale. The meter will give the SWR reading directly.

6. A 1:1 ratio is the ideal match. Adjustments on the antenna system should be made so that the SWR is as low as possible. A SWR of 2.0 is considered satisfactory, taking into account the line losses and slight mismatching. The operator is referred to the numerous articles in radio magazines and books dealing with various proper matching methods of different types of antennas. NEVER attempt to adjust the set to the antenna.

7. The power required for the SWR bridge operation is dependent on the frequency; about 25 watts of 3.5 MHz, 15 watts at 7 MHz, and proportionately lower power at higher frequencies. If the transmitter power is not sufficient and a full meter swing cannot be achieved, adjust the antenna system for the lowest possible swing at the โ€œREFโ€ position of the slide switch.
How do I use the meter to read RF Power
From OPEK's Manual:

1. Connect the SWR-3 โ€œTRANSโ€ connector to the transmitter output, and โ€œANTโ€ to antenna connector.

2. Set the slide switch (SWR, PWR) at POWER position, and set the range slide switch (FWD, REF) to either 10 watts or 100 watts position, whichever is suitable.

3. When the transmitter switch is on, the meter needle will deflect. Read the amount of deflection on the top scale. If the range switch had been set to the 100 watt range, the value is multiplied by 10.

4. For accurate power reading the SWR-3 should be used in circuits having SWR value of up to 1.5. The meter accurately will decrease if the SWR value exceeds 1.5.

5. Always have the meter switched off when removing this meter from the circuit.

6. NEVER disconnect the โ€œANTโ€ connector when transmitting. The abnormal voltage generated may damage the transmitter.
How do I use the SWR-3 as a field strength indicator?
This instrument is designed so that comparative RF field strength can be determined. A pair of diodes has been inserted in the circuit to rectify the RF energy picked up by the small antenna. Remove the instrument from the transmitter output circuit and restore the former transmitter antenna connections.

1. Set the slide switch to โ€œSWRโ€ and โ€œFWDโ€

2. Fasten the bar antenna to the stud on the side of the case.

3. Bring the SWR-3 in the vicinity of the transmitter of antenna system with the transmitter in operation. Be careful that the pickup antenna does not come in contact with any metallic portion of the transmitter or antenna.

4. The adjusting knob is rotated to obtain a convenient reading on the meter.

5. After the aforementioned steps have been taken, any adjustments performed on the transmitter or antenna will be reflected by an increase of decrease in the meter reading.

Why buy Opek Technologies from Walcott Radio

  • 30-day hassle-free returnsChanged your mind? Send it back within 30 days.
  • Fast shippingMost orders arrive in 2โ€“3 days from our Iowa warehouse.
  • Real radio peoplePhone and chat support from staff who install this gear every day.

What customers say about Walcott Radio

★ 4.8 ยท 2,515 Google reviews
ZZach★★★★★

So my Stryker I had received for Christmas is truly phenomenal, and just as I had hoped it performed flawlessly from the box. I had a few changes that needed made for antenna height, and location the best bracket. Within an hour of email each question I received timely responses with guidance/links where to find what I was looking for. A coworker and friend of mine recommended using this company for my radio needs, and they certainly did NOT disappoint. I will forever recommend them not only for their prices, their product, but also for the ease, assurance, timing, and excellent professional staff that have assisted me with any and all questions. My hats off to y'all, and I definitely hope one day I'm out your way to visit the shop and thank y'all in person! 5 stars isn't enough, but it's all I've been given as an option. Y'all deserve 50 stars!

Google review
RLRandy Leopard★★★★★

I am a repeat customer for a reason! There are hundreds of places to buy radio equipment/accessories from but Walcott is my go-to because they are an honest and trustworthy site. Recent purchase was for a couple Stryker rigs with some bulk repair accessories and once again, the folks at Walcott came thru with another A++ transaction. Even with the custom tuning I requested, the units shipped on the 2nd day and arrived the next day in a well secured package and in fine shape. I have zero complaints and everything is working as it should. Will continue to use Walcott as a supplier of new equipment and especially for their fair priced, quality repair & upgrade components. These guys are way more than just another online CB retailer, much more!

Google review
Anonymous★★★★★

All I can say is WOW, I remember venturing into this shop when they were a small but well recommended by fellow truck drivers on the road, many years ago. I am still impressed, they have grown into a great company and have many more things to offer. I ordered a GMRS antenna kit for my 24 Ram and the shipping time was quick. I will continue to be a customer, these folks are still at the top of their game in my book!!!

Google review
Anonymous★★★★★

I ordered a President George cb radio on Monday, it arrived Wednesday. Well packaged, free shipping. Today (Thursday) I ordered a Stryker antenna, and got an email saying it had already shipped and will be delivered Saturday. Their response to orders is impressive! I was told that this cb/antenna combo is one of the best. I am impressed with this company so far, and I have read nothing but good reviews on them. I will definitely use Walcott Radio for anything I need down the road.

Google review
Anonymous★★★★★

The shopping experience is about as easy as tying your shoes. Didn't have one problem and received a very fast reply back to numerous questions in emails, ONLY 3 days ship time from Iowa to Texas including purchase day. Radio works great and new owner very happy again. FANTABULOUS..!! Beyond 1st class customer service and then some, thanks to all at Walcott.!

Google review
Anonymous★★★★★

What a great experience! Could not believe how fast my radio was shipped. Ordered a President McKinley with the power mod and it works so much better than my stock McKinley. Dead key is about 3.5 lowest and pep about 25 highest with a good forward swing. My other McKinley stock would only put out 13watts pep with backward swing Hope this review helps someone else with their McKinley. What a great base and mobile radio!

Google review

Discontinued Opek Technologies products

8 models ยท 5 have a replacement

Still running one? Each card links to its product page and to what replaced it.