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Author Topic: What hand-held(key-fob?) to control a Lamp-Module?  (Read 8295 times)

CCinPA

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #15 on: April 07, 2020, 08:29:26 PM »
Newer versions of the TM751 use a superheterodyne RF receiver which has a fairly narrow bandwidth and may or may not be accurately tuned to 310MHz. The KR19A may also not be accurately tuned to 310MHz. This could explain the short RF range.

What unit(s) would you suggest?
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dhouston

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #16 on: April 07, 2020, 08:50:11 PM »
Quote from: CCinPA on April 07, 2020, 08:29:26 PM
What unit(s) would you suggest?
How much range do you need?
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CCinPA

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #17 on: April 07, 2020, 09:20:42 PM »
The two Lamp-modules are 30-feet, thru a cinder-block-wall, from where I want to use the key-fob(?)/transmitter.  The transceiver is located outside(under-porch); Just on the other side of a cinder-block wall from the lamp-modules. And as I stated... To activate I have to be 10-feet from the outdoor transceiver to activate the lamp-modules located just inside the basement cinder-block wall.  Does this help?     
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bkenobi

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #18 on: April 08, 2020, 02:19:19 AM »
With a antenna modded cm15a coupled to a RadioShack antenna in the attic and a signal booster, I can send on/off commands from my hr12a remotes from the woods 300ft from my house.  I can go farther, but that's more than enough for most people.
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Brian H

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #19 on: April 08, 2020, 06:40:15 AM »
Is the 10 feet distance. With you on the other side of the cinder block wall from the TM751 or 10 feet from the TM751 on the same side as the cinder block wall?
The cinder block wall could be reducing the distance if you are sending the X10 RF commands through it. Especially if there is any metal reinforcement in the wall.
« Last Edit: April 08, 2020, 06:47:58 AM by Brian H »
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Tuicemen

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #20 on: April 08, 2020, 07:27:06 AM »
Ground height of the transceiver  realy does make a difference as well. The higher the antenna  is off the ground the further your range will be generally. >!
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dhouston

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #21 on: April 08, 2020, 07:53:17 AM »
Typically, the maximum reliable range of X10 RF transmitters is 25-30 feet. While I don't recall range testing the KR19A I suspect its range is less than typical. With the distance between the transmitter (i.e. your handheld KR19A) and the transceiver (i.e. your TM751) at 30 feet it's not surprising that you have problems.

The KR22A mentioned by tuicemen earlier in the thread might perform better but I have no hands on (pun intended) experience with it. X10 does claim it has 100 feet range.

It is possible to modify a TM751 to improve RF range but this is not a simple modification and is only recommended for those with electronics/electrical knowledge/experience.
https://www.laser.com/dhouston/ImproveTM751.html
« Last Edit: April 08, 2020, 08:09:14 AM by dhouston »
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CCinPA

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #22 on: April 08, 2020, 08:14:26 AM »
PS: How do I insert a picture from my desktop?
http://forums.x10.com/index.php?topic=10516.msg60285#msg60285

I tried these instructions... But it seems I don't have the permission to do so. 
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CCinPA

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #23 on: April 08, 2020, 08:19:55 AM »
I have such a nice picture to post... But can't.
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CCinPA

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #24 on: April 08, 2020, 08:31:09 AM »
The KR22A mentioned by tuicemen earlier in the thread might perform better but I have no hands on (pun intended) experience with it. X10 does claim it has 100 feet range.


I believe this is the transmitter I am using... ?
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CCinPA

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #25 on: April 08, 2020, 08:44:45 AM »
LAMP-MODULE >>> 10-FEET >>> CINDER-BLOCK-WALL >>> 10-FEET >>> TRANSCEIVER(OUTDOOR) >>> 20-FEET-LINE-OF-SITE >>> TRANSMITTER
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dave w

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #26 on: April 08, 2020, 09:15:39 AM »
Quote from: CCinPA on April 08, 2020, 08:31:09 AM
The KR22A mentioned by tuicemen earlier in the thread might perform better …

I believe this is the transmitter I am using... ?

https://www.x10.com/kr22a.html
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dhouston

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #27 on: April 08, 2020, 09:22:03 AM »
Quote from: CCinPA on April 08, 2020, 08:44:45 AM
LAMP-MODULE >>> 10-FEET >>> CINDER-BLOCK-WALL >>> 10-FEET >>> TRANSCEIVER(OUTDOOR) >>> 20-FEET-LINE-OF-SITE >>> TRANSMITTER

20 feet through a wall puts it at the typical limits for the keyfob you are using.

You might try eliminating the appliance module and moving the TM751 to that outlet with the lights connected to the TM751 outlet. This would eliminate the wall and reduce the range to 10 feet.
« Last Edit: April 08, 2020, 09:25:48 AM by dhouston »
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dave w

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #28 on: April 08, 2020, 09:29:03 AM »
Quote from: CCinPA on April 08, 2020, 08:44:45 AM
LAMP-MODULE >>> 10-FEET >>> CINDER-BLOCK-WALL >>> 10-FEET >>> TRANSCEIVER(OUTDOOR) >>> 20-FEET-LINE-OF-SITE >>> TRANSMITTER
So the transceiver is outdoors, your key fob is only used outdoors also. You use the fob to turn on inside lights as you approach house(?).
I think you said the transceiver is under the porch, so must be near to ground. Can you elevate the transceiver? Can you test by putting transceiver on an extension cord and get it out from under porch and a few feet off the ground? I realize this isn't the way it can stay, but is a test.
Also is there an outlet on the inside wall of the porch? If so, can the TM751 go there?
If someone else already went down this road, my apologies, I just woke up.  ;)
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Tuicemen

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Re: What hand-held(key-fob?) to control a Lamp-Module?
« Reply #29 on: April 08, 2020, 10:54:12 AM »
Quote from: CCinPA on April 08, 2020, 08:14:26 AM
PS: How do I insert a picture from my desktop?
http://forums.x10.com/index.php?topic=10516.msg60285#msg60285

I tried these instructions... But it seems I don't have the permission to do so.
Newbies are restricted from adding attachments, since your status is now Jr. Member you should be able to post attachments ( pictures)
Quote from: CCinPA on April 08, 2020, 08:31:09 AM
The KR22A mentioned by tuicemen earlier in the thread might perform better but I have no hands on (pun intended) experience with it. X10 does claim it has 100 feet range.


I believe this is the transmitter I am using... ?
  the kr22a is a credit card style remote  and can control 4 x10 sequential addressed devices. I did manage to test one of these newer built fobs  and was able to get close to 100 ft  range however this was with my transciever located high in the house with no metal objects between.
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