I replaced the Linksys power supply on my WRT-300n v1 with a switched 90W model, and bumped the power up to 500mW.
Neither InSSIDer nor Xirrus Wi-Fi Inspector show a significant change in RSSI, which stays around -70dbi. It also looks like throughput is maximised around 125mW.
Can anyone explain why the signal strength doesn't increase with power?
cause dd-wrt support power change on alot of "N" Routers.
and dont know if it EVER will?
it dont matter if you set the power to 0mW
it will not change with dd-wrt
Dont fool your self in thinking that it wotks better @ 125mW over 0mW , 1mW or 251mW Cause it dont change.
Joined: 10 May 2008 Posts: 1380 Location: Pacific North West, USA
Posted: Sat Sep 19, 2009 12:14 Post subject:
Has this changed recently or with newer builds?
Or does it depend on the router itself?
On my 2 - WNDR3300's, I increased from default 71mw to 131mw
They are setup as an Access Point and Repeater Bridge configuration
Signal strength on both of them went from 30-30% up to 40-42%
I didn't see noise increase any significant amount.
Both of them have upgraded replacement power supplies,
they are not using the stock netgear ones that came with the routers. _________________ Soylent Green Is People !
=-=-=-=-=-=-=-=-=-=-=
Netgear Nighthawk R7000 - DD-WRT Build R46220
Linksys EA8500 - OpenWRT IPQ806x Trunk R16375 5.4 Kernel
So dd-wrt won't let me change the power output on my WRT-300n?
That explains why I don't see much difference in measured signal at the laptop!
But in that case how does dd-wrt adjust the power?
It seems to step up and down according to some algorithm. When the broadcast signal is strong I get a good connection, but unfortunately there are other times when it broadcasts at such low power - up to 30dB lower - that I can barely connect.
And I can't find a reliable way to overcome it, other than to move much closer to the router. That is really frustrating!
I'd really like to be able to control the power.
By the way, there wasn't any observable noise on the WRT 300n signal before upgrading the power supply, and there still isn't any. I didn't detect any noticeable improvements over the Linksys model.
Joined: 26 Jan 2008 Posts: 13049 Location: Behind The Reset Button
Posted: Mon Sep 21, 2009 13:40 Post subject:
I think the power supply thing came mainly from the work being done on the 610. The 610, the xmit power setting work on both radios. On the 600, xmit works on wl1 (5ghz) but not wl0 (2.4ghz). The power settings work on the older wrt54g series routers but do not seem to work on the newer ones. The 300, 350, etc. _________________ [Moderator Deleted]
Joined: 09 Jul 2006 Posts: 71 Location: Nanaimo BC Canada
Posted: Wed Sep 23, 2009 3:27 Post subject:
DHC_DarkShadow wrote:
hardwarewizard wrote:
Radioman193 wrote:
hardwarewizard wrote:
interesting i am having trouble finding a 12v supply with the correct size end it should be 2.1mm, 5.5mm, 12mm
most i find are 2.5mm
You would Think It shuld be Easy for a "hardwarewizard" to change a plug
it is but doesn't look as good as a molded connector
The power connector for the WRT54G series routers, are they 5.5mm? I don't have a metric measuring tape or ruler.
5.5 looks right to me and my tape
I changed my WRT54G ps to 12v 5a and what a difference in the signal stability....signal used to jump all over and now it is pretty tight (looking at inSSIDer)
squibt _________________ Buffalo WHR HP 54G
Linksys WRT 54 GS V1
Linksys WRT 54 G V2
2Wire (dont ask)
Thanks for making your Pictures smaller. I'm tired of scrolling side to side to see all of this.
Dude, get a bigger monitor!
well - my 12V 5A power supplies came yesterday....
Turns out the connector (size and polarity) is a perfect match so no cutting and soldering for me!! (wrt310N)
Immediately, I picked up a 10% improvement in my overall signal between my WRT310N AP and WRT310N CB - from 40% to 44-46%. My signal strength increased and my noise number decreased.
During file transfers I no longer see any chopiness in the dd-wrt or the IPERF graphs. Almost perfect straight lines.
Both units are running fine - no extra heat has been noticed.
I did not have any reboot issues before so I cant comment on this.
More information
I tried increasing my transmit power on my WRT310N's from the 40Mw I had been using back to the default of 70Mw.
Note: I had been using 40Mw as this gave me the most stable connection. Signal was not that strong but it gave the best throughput - I assume due to the cleaner signal.
With both my AP and CB ( both wrt310n's) set at 70Mw - I am getting the best signal strength I have ever seen as well as the best SNR and signal numbers I have ever seen with this device. The units are running slightly warmer (to the touch) but I dont see cause for concern here.
My guess is the radio is now able to generate a clean signal (no clipping or distortion) at the higher settings.
Another note: The stock PSU that came with the WRT310N was 1.0A
At this point I would highly reccomend to anyone to try a better power supply
I received my wrt320n routers with crappy 1.0 Amp power adapters and ordered the 5Amp units that you bought for your 310. Thanks for your input. _________________ Home Network on Telus 1Gb PureFibre - 10GbE Copper Backbone
2x R7800 - Gateway & WiFi & 3xWireGuard - DDWRT r53562 Std k4.9
Off Site 1
R7000 - Gateway & WiFi & WireGuard - DDWRT r54517 Std
E3000 - Station Bridge - DDWRT r49626 Mega K4.4
Off Site 2
R7000 - Gateway & WiFi - DDWRT r54517 Std
E2000 - Wired ISP IPTV PVR Blocker - DDWRT r35531
Joined: 22 Oct 2009 Posts: 157 Location: North East - USA
Posted: Thu Nov 12, 2009 22:17 Post subject:
The output voltage on the power adapter of my WRT54GL-1.1 was 17v (17v is not a typo) which is specified to be 12v/1A. I modded a microATX Seasonic PSU (12v/10A) to use with my WRT54GL which has exactly 12v output using the same multimeter. I used the power-plug/cable from an old 3Com cable modem and connected to the 12v output on the mATX PSU. It is working perfect and I think there is improvement on the signal quality as well as temperature. I use 50mW TX power parabolic reflectors with default antennas and overclock the CPU to 250 MHz. Now I will eliminate the other power supplies from cable modem and WHR-G300N. I think 10A of Seasonic is sufficient for all of them. It is a fairly easy mod. You can find the most important detail here.
http://modtown.co.uk/mt/article2.php?id=psumod
After that just use yellow/black cable pair on any connector for 12v output.
By the way, This is my first post after following this forum for a long time. Hi everyone _________________ WNR3500L DD-WRT-18730-Kong Gateway/Firewall/NAS
WRT54G-TM DD-WRT-14929 Mega (heatsink + 250MHz oc)
WHR-G300N DD-WRT-20548(external antennas)
2x E2000 Tomato-Toastman 0501.2 AP (external antennas)
TEW-652BRP Gargoyle 1.5.9 Client Bridge (antenna upgrade + heatsinks + ventilation)
The Router is a wrt300n V1.0
the caps that i used were 35v 200uF layed on there sides i dont have pictures now but will when i get my new camera.
the powersupply that i have on it is a
HP F1140A 12v 5A switching power supply
you can get them here for $14.00+
http://www.alancomputech.com/f1140a.html
you can controle the voltage from like 8 to 16+ volt
Other Power supplys
you can use are
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6256
I picked up the F1140A for my wrt610n v2 and the router will not power on with it connected. The light on the adapter goes dim and flickers. I RMA'd the first one thinking the supply was bad, and the second one does the same.