1 kW PEP power meter by VK4AOI
A meter to measure PE power is very useful. This circuit using a LED Bar graph can be built in two forms and can set-up for either 1 kW or 150 Watts full scale.
https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/ar/1989/06/page18/index.html

50 Ohm SWR meetbrug door PAØFNB
Als je veel met antennes bezig bent zoals op velddagen, vakanties en niet te vergeten thuis, is het prettig een meetinstrument te hebben om te zien wat je aan het doen bent.
http://www.pa0fnb.nl/Antennes/SWR%20meetbrug/50%20Ohm%20SWR%20meetbrug.pdf

A Resistive SWR Bridge by G3YCC
The bridge shown is popular with QRPers. There is no setting up to do and the circuit need not be laid out symetrically as with other designs.
http://www.zerobeat.net/g3ycc/res_swr.htm

A Simple LED SWR Bridge by GØWQR
This simple SWR bridge uses a superbright LED instead of a meter and was described by G0WQR in Sprat 93. He found the LED is fully illuminated with less than 1 watt output and extinguishes when minimum VSWR is achieved.
http://www.zerobeat.net/g3ycc/ledswr.htm

A Wifi (V)SWR Meter to build yourself by PE2ER
When building antennas for the Wifi band (Like the 8dBi omni), a need for an easy way to check the antennas arose. A Voltage Standing Wave Ratio (VSWR) meter useable at the 2.4GHz band is however, hard to find.
http://pe2er.nl/wifiswr/index.htm

ALTAI CB SWR Meter Conversion for HF Bands by G8ODE
Following the purchase of a Yaesu FT817 rig it was decided to make an SWR meter to match a Bremi BRL15 Tuner that had already been modified.
https://rsars.files.wordpress.com/2013/01/altai-swr-meter-conversion-for-hf-bands-1-31.pdf

Digital Power and SWR Meter by OH2NLT
I started to experiment with HF FET amplifier. Amplifier project is not yet ready but this SWR meter diversified off from it. Amplifier controller is going to include this SWR meter and other bells & whistles.
http://www.jumaradio.com/oh2nlt/Swrmeter/swrmeter.htm

Digital Wattmeter by OZ2CPU
This instrument can be used and calibrated from 1 kHz and up to 500 MHz. It is possible to measure power relative all the way up to 900Mhz. A software routine can calibrate the 0dBm point at 5 different frequencies to make this instrument accurate within 0.5dBm !!
http://www.webx.dk/oz2cpu/radios/miliwatt.htm

Digitale SWR/Power meter door PAØEJH
Inmiddels heb ik ook een HF swrbrug gemaakt die tot 50MHz bruikbaar is. De print past in een klein blikken of aluminium doosje, en kan als Remote-sensor met een 3 aderig snoer ergens in de Shack een plaatsje vinden.
https://voorzitte8.wixsite.com/pi4zlb/een-digitale-swr-watt-meter

L.F. VSWR Meter by GØMRF
The circuit for the VSWR Meter is by no means original, but it is probably one of the most useful accessories that I've made for my LF station. Constructed from parts collected at Radio Rallies, the total cost was £8 ($12).
http://www.g0mrf.com/lfswr.htm

QRP Antenna Bridge by KB9II
I thought it would be a good idea to put in a few schematics for accessories that I've found useful here. One of these is an antenna bridge for QRP applications. I know of a few "thru-line" or wattmeter styles, but most SWR meters can't really go down to the low powers in QRP work.
http://my.core.com/~jematz/qrp/kb9ii-s2.htm

QRP Power meter door PE1KQP
Dit is een eenvouduge relatieve powermeter tot maximaal 1 Watt.
De weerstanden en diode en condensator op het chassiedeel solderen.
http://pa0ebc.nl/pe1kqp/indexc616.html?page=qrp-power-meter

QRP POWER METER and DUMMY LOAD by AA5TB
The above schematic is of my QRP power meter and dummy (50 Ohm) load combination. The 50 Ohm load consist of resistors R2 through R5. The four 200 Ohm resistors in parallel combine to make 50 Ohms.
http://www.aa5tb.com/qrpmeter.html

QRP SWR Meter by JF1OZL
A lot of troubles occur, when I make expedition on the local hill. For example miss connection between transceiver and the antenna occurs sometimes. In order to avoid these troubles, I will recommend you to use the SWR-meter in every time of your QSO.
https://www.qrp-ja.net/jf1ozl/swrk.html

Simple QRP Reflectometer & Power Meter with By-pass Switch by GW3UEP
http://www.dstarcomms.com/GW3UEP/TestGear/QRPMeter/qrpmeter.htm

SWR meter voor de hogere frequenties door PE1KQP
Veel swr meters die voor de 27 mc verkocht worden zijn met een kleine aanpassing op 2 meter goed te gebruiken.
Om de bruikbaarheid te testen doe je de omkeerproef.
http://pa0ebc.nl/pe1kqp/index9648.html?page=swr-meter

Wideband SWR meter by XQ2FOD
Everyone involved with radio transmitters needs some instruments to assess basic antenna functionality. Among these instruments, the best-known and most-used one is the Standing Wave Ratio meter.
https://ludens.cl/Electron/swr/swr.html