I ordered a talking house tx w/o a power adapter.
Can someone with one of these units please tell me what the ratings are for the adapter? Need the voltage, amps and the positive pin position.
I ordered a talking house tx w/o a power adapter.
Can someone with one of these units please tell me what the ratings are for the adapter? Need the voltage, amps and the positive pin position.
Thanks
ok, i found it
I dug a little deeper into the past post’s for the talking house and found the manual in pdf . I downloaded the file and the power required is 18v, the middle pin is positive.
The only thing i don’t know is the amps ratings for the factory power supply, i don’t want to apply too much to the tx and risk frying it.
I am assuming it would be in the mA range.
Also I appreciate the link to the manual, that was really helpful.
Watch for my personal review of this transmitter in a few days since we just put the order in today from ebay.
Power Supply
Rock,
The supply will not “apply too much” current. The tx will draw only what it needs. The power supply needs to be able to supply this current. No harm if the supply is rated for more amps than the unit needs. The supply will supply the rated voltage and the current will be what it needs to be. This is like comparing the current required by a 7 watt night light to that of a toaster. They both work with the same 120 V outlet and they both draw what they need. As long as the supply can supply the needed current at the required voltage then all will be well. The voltage has to be right however.
Just make sure about the polarity, DC vs. AC, and regulated vs. non regulated. I would go for a regulated switcher at the required voltage and at least the amp rating or higher. All Electronics has a bunch of these available in the $10 to $20 range.
Neil
I tend to be too careful..
🙂
I try not to take too many chances with my gear.
These day’s i haven’t been in the mood to tinker with much of anything, in fact my minivan needs some minor work and i keep putting it off.
I will look into the regulated switching and thanks for reminding me of All Electronics. I used to get catalogs from them years ago.
Another favorite is R&L electronics in Hamilton,Oh.
I went there when I had a project that couldn’t wait for mail order parts.
I’ll let you know how it went.
Grounding
One thing about the Talking House power supply, it is a 3 pin AC plug and the ground pin is used to supply a ground connection to the unit. Checking with an ohm meter, I find the ground pin in direct connection with the barrel of the power connector that plugs into the unit.
I suppose you could attach a separate ground connection to the chassis.
I measured the voltage coming from the “Custom R.E.L. Power Supply” that came with one of my Talking House transmitters. TIP positive at 13.7 Vdc open circuit. And of course the tag on the power supply cautions that using any other supply may damage the transmitter and void the warranty.
The unit this power supply came with is a TH-II and on the supply is marked TH-2000.
TH power supply….Uh Oh!
In light of MRAM’s post I think caution and more information are in order. Here’s why:
Some devices use “wall warts” and internally regulate the voltage down to what is required. Maybe the 18 V you mentioned is cut to 13.8 internal to the tx.
Some devices use unrectified AC.
Some use rectified but unfiltered DC.
Some require that the “wall wart” provide the proper regulated DC voltage.
Don’t try this unless you are sure of what you are doing, but even in devices which expect AC there is usually no harm in applying DC as long as the voltage is the proper value. This is because DC will get through the typical rectifier circuits. The trick is to find the right DC voltage to apply. Applying an AC voltage to a device designed for DC is a disaster. Unless you are sure of and understand the transmitter power requirements don’t try this.
The best thing would be if you could either locate the proper supply or at least get a firm handle on the specifications. It would be great if the volts and mAs are printed on the chassis next to the power jack.
Neil
This unit is a TH 2
From the tag on the bottom of the TH it does say this model is the TH 2.
Also I found this file online that says:
Power Supply
• Input power requirements: 115v AC 60Hz 0.1 Amp
• Output voltage: 12v DC 0.2 Amp
I thought this was odd since on the back of the TH it states 18 v right below the plug for the power pack. I can only assume that much like other devices I have seen lately the TH probably can take a min. of 12 v and a max of 18 v.
Another TH 2
We have another TH2 on it’s way with the original power cord included.
This is a plus! lol
I should get this in the next few days.
Ill let you know how things go.
Until then Keep Rockin’
voltages ..
I have ( 4 ) 5.0 talking house transmitters and their respective OEM walwarts which
all measure 19.56vdc when measured on a fluke vom.
For kicks, this weekend I hooked one up to a 12vdc filtered QJE power supply because,
I was so tired of the AC hum coming from the OEM walwart they supply.
I suspected that their Transmitter was one that could take 12-24v but
not till I actually put 12v on the transmitter, did I realize indeed, it does 12vdc just fine 🙂
It was a nice surprise to know it’s like most of my transmitters
that take 12vdc…
Joe the
Radioham dood…