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Thanks for a very informative video. I bought a TRPD 1554 on ebay that was tuned to 158 mhz and 155 on the low side. I had to install 18ph capacitors on the high side to get back the 600 khz split for ham use (as Telewave recommended). However, the notch on both the TX and RX sides was on the higher side. Since I am not in the US, to send the duplexer back to Telewave, I ordered some RG402 cable and made my own coupling loops and was successful getting the notches where I wanted on both sides. When the duplexer was tuned using the Rigol 815TG, I was able to achieve over -75 db at about 1.2db insertion loss per side. However, knowing that reducing insertion loss too much lowers the Q, I chose to settle for 1.5db insertion loss that gave me better Q. Although the final effort seems satisfactory, I am assuming that my inter cavity cables might be cut for higher than the ham band. Can you please tell us the theory behind how to move notches from the low side to the high side and vice versa? Is it dependant on inductance if the loop? At least one other person has asked the same question and an answer will be beneficial to us hobbyists. Thanks Telewave.

What is the model of return loss bridge are you using? Thank you.

This video didn't show how to tune the cavities...the 1505 isnt the same as these cans.

"promosm"

Traductor

I want one.

What determine the 17db reference line?

Why tjese called forward directionals

Hello good morning. checking the cavity adjustment video, it strikes me that within the adjustment process, the screws that hold the female connector to the cavity are tightened or loosened, my question is: those should not be touched within the readjustment process of the cavities due to changes in frequency?, or if they should be adjusted to achieve an optimal fit?

We are a large manufacturing vendor of passive components in China. We can provide you with customized productions with good quality and pretty competitive prices!

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Save your money and go with a Bird. We purchased 4 of these and all 4 have failed to power up. Sent in for RMA repair because they needed new batteries and it is a factory-only repair. Took a year to get back and their service is the worst. Needless to say, when we finally got them back they didn't last a month. Absolute junk. DON'T PURCHASE THIS HORRIBLE GARBAGE!!!!

I bought one of these meters April 2020, worked fine for 6 months then failed to power up. Finally had Telewave issue warranty RMA (difficult process)and sent back in Feb2021. More than a year later Telewave still have not fixed it, and mostly ignore my calls and emails for a progress update. Not happy.

Hola donde puedo comprar sus productos

I have a combiner with 4 of these cavities in the 88 - 108 MHz band that I need to retune. How do I calculate the length of the cables?

Show 👏👍

What is the valu or specification of Piston tuning capacitor in TPRD-1454 ? It wikk be the great help

I don't do any of this anymore, LOL if I live long enough I might. I'm 73. This is just an EXCELLENT video

thank you for the video, I have just buy a rigol 815 with tracking gen, pleased to see this video

Very informative sir, thank you.

Nice video! You guys should do more of them. You make great products.

I AM THE ENGINEER WHO DEVELOPED LOW PIM ANTENNA'S FOR TELEWAVE ; AND THEN ROBERT BAGHERI GAVE ALL CREDIT FOR MY WORK TO AMIN RIDA ; AND THEN TELEWAVE FIRED ME ; JUST TO COVER IT ALL UP...... TELEWAVE "HAS NO CLUE" HOW TO BUILD LOW PIM ANTENNA'S ; LET ALONE NO CLUE HOW TO BUILD LOW PIP / LIGHTWEIGHT TOP LOADED CO-LINEAR ANTENNA'S.

Does it matter what side u tune for return loss on. Seems I can always get one side great but not the other, going back and forth...

Thanks for this, it's much appreciated. Any clue as to whether using it below 20 MHz would damage the meter at all? Not bothered about accuracy, just routine deployment as a running check on reflected power. Thanks.

Dear Friend.. congratulations for you video... please you can make a video but in spanish... or with subtitules in spanish!! Regards from Chile!

Our unit has spent more time back to the factory than it has in the field. A $1600.00 disappointment.

when and how to use a preselector duplexer? and when to use a band pass filter, when to use a band pass/reject filter and when to use a notch filter?

I'm making a duplexer set for 147.300Mhz TX and 147.900 RX I want to know if the TX and RX sides are the same, both with capacitor? how to move the notch opposite from the peak? I will appreciate your answer.

Hello, I'm making some duplexers (first time) I want to know if the TX and RX duplexers are the same, I mean they have both in TX and RX side an capacitor? because the RX side is opposite of the TX, how to get that reverse?

I have some similar TX TX System 28-38-03A units for sale on ebay, my handle AppliaceWorks Thank for making this video !

Great video guys. You make fantastic products.

Interesting video ! Congratz !

Muy buena la explicación sobre el uso del vatimetro telewave!

What make/model network analyzer are you using in this video?

What make/model torque wrench are you using in this video on that antenna connector?