Aurora RF Connector getting Warm. - UK Vintage Radio Repair and Restoration Discussion Forum

ChristianFletcher · 19th Oct 2006, 7:40 pm

Is it normal for the RF output connector on the Aurora to get warm in operation. I have checked the supply voltage and input on the TV for any unwanted Vdc or short and this is all OK.

This is probably normal but I wanted to make sure.

Regards Chris.

ppppenguin · 19th Oct 2006, 7:42 pm

The whole converter does get slightly warm, especially if the DC power supply is over 9V. It will run on as little as 7V and stay cooler too. Over 12V is not recommended.

At higher input voltages most of the heat is dissipated in the regulator that makes 5V for the whole converter. There are other regulators that take 5V and produce the lower voltages needed by parts of the circuit. All the regulators are linear because the total amount of power doesn't justify more complex and expensive switchmode designs.

molochkartovski · 19th Oct 2006, 9:36 pm

I've had mine on all day and yes you're right the RF connector is warm. It doesn't seem to be any warmer than the rest of it though. I guess it must be normal.

Richard

tubesrule · 20th Oct 2006, 12:05 am

The metal RF connector will feel slightly warm. This is normal. The main power regulator is right next to it on the circuit board, so depending on what voltage your putting into the unit, some of the heat will dissipate out the connector. As Jeff mentioned, with 7VDC in, there is almost no residual heat, with 12VDC there is about 1 watt of lost energy to dissipate.

Darryl

19th Oct 2006, 7:40 pm	#1
ChristianFletcher Heptode Join Date: Dec 2003 Location: South Yorkshire, UK. Posts: 900	Aurora RF Connector getting Warm. Is it normal for the RF output connector on the Aurora to get warm in operation. I have checked the supply voltage and input on the TV for any unwanted Vdc or short and this is all OK. This is probably normal but I wanted to make sure. Regards Chris. __________________ Every Silver Lining Has Its Cloud https://youtube.com/channel/UCvBpiuUUnErJlNBm6DWb3Ww

19th Oct 2006, 7:42 pm	#2
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Aurora RF Connector getting Warm. The whole converter does get slightly warm, especially if the DC power supply is over 9V. It will run on as little as 7V and stay cooler too. Over 12V is not recommended. At higher input voltages most of the heat is dissipated in the regulator that makes 5V for the whole converter. There are other regulators that take 5V and produce the lower voltages needed by parts of the circuit. All the regulators are linear because the total amount of power doesn't justify more complex and expensive switchmode designs.

19th Oct 2006, 9:36 pm	#3
molochkartovski Tetrode Join Date: Jun 2005 Location: Wilton, Salisbury, Wiltshire, UK. Posts: 66	Re: Aurora RF Connector getting Warm. I've had mine on all day and yes you're right the RF connector is warm. It doesn't seem to be any warmer than the rest of it though. I guess it must be normal. Richard

20th Oct 2006, 12:05 am	#4
tubesrule Hexode Join Date: Jul 2004 Location: Michigan USA Posts: 325	Re: Aurora RF Connector getting Warm. The metal RF connector will feel slightly warm. This is normal. The main power regulator is right next to it on the circuit board, so depending on what voltage your putting into the unit, some of the heat will dissipate out the connector. As Jeff mentioned, with 7VDC in, there is almost no residual heat, with 12VDC there is about 1 watt of lost energy to dissipate. Darryl