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Old 26-03-2015, 03:06   #1
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SWR twin needle meters

Anyone knows of a reliable and not to expensive SWR twin needle meter, not from US, since shipping cost to Sweden is more than cost of SWR.
Also if the Chinese digital ones are reliable...my experience of Chinese stuff is sometimes really good and sometimes crap.
Is there any other solution better than the twin needle type?
I have a Yaesy System 600 with all equipment waiting to be installed in my boat.
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Old 26-03-2015, 05:36   #2
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Re: SWR twin needle meters

Quote:
Originally Posted by tolly View Post
Anyone knows of a reliable and not to expensive SWR twin needle meter, not from US, since shipping cost to Sweden is more than cost of SWR.
Also if the Chinese digital ones are reliable...my experience of Chinese stuff is sometimes really good and sometimes crap.
Is there any other solution better than the twin needle type?
I have a Yaesy System 600 with all equipment waiting to be installed in my boat.
The Daiwa CN-101L is the one you want. Here's one with free delivery in the UK at a very good price. Don't know about shipment to Sweden.

Daiwa CN 101L 15/150/1.5kW HF/VHF Power: Amazon.co.uk: Electronics

Bill
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Old 26-03-2015, 05:55   #3
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Re: SWR twin needle meters

Hi Tolly,

Don't know if you follow btrayfors posts on the forum but he is one of the forum experts on radio.

So, if he recommends the Daiwa then I would go for it.

Might pick one up myself.

Skip
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Old 26-03-2015, 06:17   #4
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Re: SWR twin needle meters

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Originally Posted by skipmac View Post
Hi Tolly,

Don't know if you follow btrayfors posts on the forum but he is one of the forum experts on radio.

So, if he recommends the Daiwa then I would go for it.

Might pick one up myself.

Skip
Agreed - Daiwa is a fairly old name in that genre of equipment, and popular among amateur radio operators - a little like the old Bird line of wattmeters.
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Old 26-03-2015, 09:12   #5
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Re: SWR twin needle meters

One would think there would be a ham radio supplier in Sweden.


73, Bob WH6UO-M
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Old 26-03-2015, 09:14   #6
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Re: SWR twin needle meters

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Old 26-03-2015, 09:18   #7
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Re: SWR twin needle meters

Quote:
Originally Posted by tolly View Post
Anyone knows of a reliable and not to expensive SWR twin needle meter, not from US, since shipping cost to Sweden is more than cost of SWR.
Also if the Chinese digital ones are reliable...my experience of Chinese stuff is sometimes really good and sometimes crap.
Is there any other solution better than the twin needle type?
I have a Yaesy System 600 with all equipment waiting to be installed in my boat.
Diamond SX20C
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Old 28-03-2015, 08:00   #8
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Re: SWR twin needle meters

What frequency and power level is to be measured?
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Old 28-03-2015, 09:04   #9
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Re: SWR twin needle meters

The Yaesu System 600 is a 100-watt multi-mode MF/HF transceiver 1.8-29.99999 mHz.

Bill
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Old 29-03-2015, 07:39   #10
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Re: SWR twin needle meters

If using a transmitter with a nominal power output of 100-Watts, you should select a cross-needle wattmeter with a power range of about 150-Watts. When measuring VSWR with a wattmeter, the INCIDENT power will often be measured as higher than the actual power being delivered. Thus the scale or range on the wattmeter needs to be greater than the actual power by perhaps 1.5-times in order to prevent the meter needle from being pegged at full scale when the wattmeter is inserted into a transmission line with some standing waves.

The true power delivered to the load is the INCIDENT POWER minus the REFLECTED POWER. Note that INCIDENT POWER is often marked as "forward" and REFLECTED POWER is often marked as "reverse".

The DAIWA cross-needle dual-indicating wattmeters are nice products. The absolute calibration accuracy of the wattmeters is probably not a great concern in tuning an antenna, since the general goal is to tune for minimum VSWR, rather than to get a precise measurement of actual power.

If the transmitter has adjustable power output, the transmitter power can be lowered to better suit the scale of the wattmeter when making antenna adjustments.
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Old 31-03-2015, 13:20   #11
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Re: SWR twin needle meters

tolly,
While Bill gave you the definite answer right up front and there's little to add.....I thought with the discussion drifting around, I'd bring it back home for 'ya!

Quote:
Originally Posted by tolly View Post
Anyone knows of a reliable and not to expensive SWR twin needle meter, not from US, since shipping cost to Sweden is more than cost of SWR.
Also if the Chinese digital ones are reliable...my experience of Chinese stuff is sometimes really good and sometimes crap.
Is there any other solution better than the twin needle type?
I have a Yaesy System 600 with all equipment waiting to be installed in my boat.
In Europe, you have access to some stuff that we in the US don't have (and vice versa)....
Here in the US, some time ago, Diawa sold smaller (mobile-sized) cross-needle meters for both HF and VHF/UHF, at various power levels....but they are no longer available here...(I bought mine in 2004, and even then I had to buy "discontinued" items)
But, in Japan and possibly other locales, there are different products available....
So, have a look around the web and see what's available where...


And, if you wish to see my set-up, have a look here....
I have the Diawa meters for both my M-802 HF, and my M-602 VHF....except for the breaker panel (Seward), I did the whole Nav Station design/lay-out/installation myself...(yeah, I'm a radio nut...)








I hope this helps...

Fair winds...

John
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