Interesting meters, thank you for showing them to us Tony. The red lines and numbers are the VSWR reading, read where the two needles cross. I used to adjust a beacon interrogater system VSWR monitor by connecting the transmitter 50 ohm output to a 75 ohm load - that gives a VSWR of exactly 1.5 : 1. Regards, David
@@gixerags750 A 50 ohm source connected to a 50 ohm load results in a perfect match and a VSWR of 1 to 1. Any other impedance load will result in a mismatch and the VSWR will be higher. At 75 ohms of load impedance in a 50 ohm system the VSWR will be 1.5 to 1. This is useful when testing or calibrating VSWR measuring circuits.
If you ever thought about doing a precise cal, you can use a Boonton or HP RF Voltmeter, and a known precise 30 dB sampler to use with the probe, as the meters read 3 Vac RMS maximum. You simply apply the correct power to a good dummy load, measure the AC voltage at the load with the probe connected to the RF sampler's port, and convert the voltage to watts. That was how Drake calibrated their wattmeters at the factory.
Génial. Je ne savais pas qu'on pouvais inverser la connectique pour étalonner l'aiguille du ROS. Merci pour cette super video. Sur le RX-1000 il ya un tuner HF et un tuner VHF UHF. On peut donc monter 2 antennes sur différentes fréquences. Par contre c'est moins bon en terme de réglage. parce que le vumetre est commun aux 2 modes. même s'il ya un switch pour séparer les 2 la masse est commune aux 2. Je dis ça je dis rien...
Hi, it usually has 2 pods for each range, forward and reflect, first try to find a schematic the RS-101 could also be a rebrand so check pictures on google and see what other brands also sell them en find maybe a schematic on those brands. if you can't find anything. start by marking the current positions of the post and then just try carefully, if you see no change, set it back as it was and try next.
I’m not able to listen to the volume but I’m watching ,, I’ll watch the complete video tomorrow with audio ,, I’ve been looking at these Daiwa meters for a purchase ,, my question is ,, are they pretty close to the accuracy of a Bird 43 ? And if not , can you adjust/calibrate them to be ?
any idea how to convert the rs-100 to cross needle?,i have one with a busted movement but a twin needle movent as a replacement but cant sus out how to alter the unit to fit it electricaly,cheers Paul m3vuv.73
Maybe its not even that hard, the crossneedle is actualy 2 meters in one... on the SWR meter there is a FWD/REF switch... maybe its a matter of connecting both side of the switch to both meters.
Yes it does like the K-PO/Diamod/Maas RS-1000/SX-1000/AV-1000 they have a band switch and more then 1 RF-Tap. but it is a big compromize and are less accurate, i found out..
Hi Tony , I have the newer push button 501H, I can't remember where I heard it, but is the right side , ie right of the middle distance of the meter, 12 o'clock, more accurate than the first half? PeaceN73sOz
Ha Tony, ik overweeg de CN-103 te kopen voor 2M en 70Cm. En zou graag van jou willen weten ofdat dat een goede aankoop is, ofdat er misschien betere in die prijsklasse zijn. 73, Ron
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Interesting meters, thank you for showing them to us Tony. The red lines and numbers are the VSWR reading, read where the two needles cross. I used to adjust a beacon interrogater system VSWR monitor by connecting the transmitter 50 ohm output to a 75 ohm load - that gives a VSWR of exactly 1.5 : 1. Regards, David
Thank you David, that is also nice information to know!
any chance you can give more detail regarding this method please? A bit of a newbie.
Cheers
@@gixerags750 A 50 ohm source connected to a 50 ohm load results in a perfect match and a VSWR of 1 to 1. Any other impedance load will result in a mismatch and the VSWR will be higher. At 75 ohms of load impedance in a 50 ohm system the VSWR will be 1.5 to 1. This is useful when testing or calibrating VSWR measuring circuits.
If you ever thought about doing a precise cal, you can use a Boonton or HP RF Voltmeter, and a known precise 30 dB sampler to use with the probe, as the meters read 3 Vac RMS maximum. You simply apply the correct power to a good dummy load, measure the AC voltage at the load with the probe connected to the RF sampler's port, and convert the voltage to watts. That was how Drake calibrated their wattmeters at the factory.
Yes thats a nice way to do it! thanks
brilliant thank you exactly what i was searching for
Great to hear!
i just bought the VHF UHF version of the meter should be similar in the process. the modell is called CN-103L
@@prepr8725 Yes its simular, but my experience with many different types Daiwa, if you did not replace any parts, the calibration is prob still good.
😊 tnx ..nice
Thanks!
Génial. Je ne savais pas qu'on pouvais inverser la connectique pour étalonner l'aiguille du ROS. Merci pour cette super video. Sur le RX-1000 il ya un tuner HF et un tuner VHF UHF. On peut donc monter 2 antennes sur différentes fréquences. Par contre c'est moins bon en terme de réglage. parce que le vumetre est commun aux 2 modes. même s'il ya un switch pour séparer les 2 la masse est commune aux 2. Je dis ça je dis rien...
thank you! merci
I have a nissei RS-101 meter and it underreads the forward power of my radio - how to I adjust it more accurately as the pods inside are not marked?
Hi, it usually has 2 pods for each range, forward and reflect, first try to find a schematic the RS-101 could also be a rebrand so check pictures on google and see what other brands also sell them en find maybe a schematic on those brands. if you can't find anything. start by marking the current positions of the post and then just try carefully, if you see no change, set it back as it was and try next.
Hi Tony..... What a beautiful team....
Thank you... some old equipment, will last forever. Daiwa good, Marconi, still going strong..and Icom...yes!! good day :)
Thanks for documenting this. I have one as well.
72/73 DE N6MGN
You are welcome. 73
Me too....thanks for the video! ;-)
I think the 'L' in the model actually means it has a light bulb. I have the plain CN-101 and it does not have the light
Thanks, i think you are right, because my CN-102 is also L form this series.
@@TonyAlbus thank you for the great video. It helped me in calibrating my meter :)
I’m not able to listen to the volume but I’m watching ,, I’ll watch the complete video tomorrow with audio ,, I’ve been looking at these Daiwa meters for a purchase ,, my question is ,, are they pretty close to the accuracy of a Bird 43 ? And if not , can you adjust/calibrate them to be ?
Hi Dallas Yes ,Bird is THE brand.. but Daiwa is a very desent Brand. In the video i do exacly that :)
any idea how to convert the rs-100 to cross needle?,i have one with a busted movement but a twin needle movent as a replacement but cant sus out how to alter the unit to fit it electricaly,cheers Paul m3vuv.73
Maybe its not even that hard, the crossneedle is actualy 2 meters in one... on the SWR meter there is a FWD/REF switch... maybe its a matter of connecting both side of the switch to both meters.
great video! thanks! a quick advice: does exist a similar meter with a huge frequency range and not only 2-150?
Yes it does like the K-PO/Diamod/Maas RS-1000/SX-1000/AV-1000 they have a band switch and more then 1 RF-Tap. but it is a big compromize and are less accurate, i found out..
Hi Tony , I have the newer push button 501H, I can't remember where I heard it, but is the right side , ie right of the middle distance of the meter, 12 o'clock, more accurate than the first half?
PeaceN73sOz
HI, yes my other Daiwa's have the same... its not 100% linear, and like all other needle meters, is better to use a lower scale when possible.
Thanks for this video
Thank you too!
Ha Tony, ik overweeg de CN-103 te kopen voor 2M en 70Cm. En zou graag van jou willen weten ofdat dat een goede aankoop is, ofdat er misschien betere in die prijsklasse zijn. 73, Ron
hallo Joop, prima meters , koop je voor je leven. ik heb ze ook van 30-40 jaar oud en nog steeds perfect. de 103 heb ik zelf ook.
Tony could you calibrate 1 of these if sent to you. :)
Hi David, no problem :) shipping will be a thing that maybe a new one is cheaper for you. 73 Tony PE1ONS
👍 🙂
Thank you!
🌟🌷🌟
Thank you!
very good thanks for sharing de garth zs5gmw
Thanks Garth! .. 73's