Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Tech Talk

Forum home - Go back to Tech talk

 HMV little nipper valve radio.
« Back · 1 · Next »
 Return to top of page · Post #: 1 · Written at 4:36:18 PM on 20 March 2021.
Bowler's Gravatar
 Bowler
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 90

Hi I intend to refurbish a HMV LITTLE NIPPER RADIO. It has the appearance of a 64-52 model but has a shortwave section. I have studied the available circuits but cant find one that exactly matches. The difference is the volume control is tapped and the tap is fed to the tone control through a 33kohm resistor. Just wondering if any one has struck this. There is also some minor changes to some component values.
Regards Bowler.
 
 Return to top of page · Post #: 2 · Written at 11:46:28 PM on 20 March 2021.
BurntOutElectronics's Gravatar
 BurntOutElectronics
 Location: Melbourne, VIC
 Member since 2 October 2019
 Member #: 2392
 Postcount: 271

https://www.kevinchant.com/uploads/7/1/0/8/7108231/64-52.pdf

Don't know if you've downloaded this one.
Different values may have been used depending on availability of parts at the time.

Wish you luck
 
 Return to top of page · Post #: 3 · Written at 11:51:30 PM on 20 March 2021.
BurntOutElectronics's Gravatar
 BurntOutElectronics
 Location: Melbourne, VIC
 Member since 2 October 2019
 Member #: 2392
 Postcount: 271

https://www.kevinchant.com/uploads/7/1/0/8/7108231/64.pdf

Here's the chassis that should be in your model
 
 Return to top of page · Post #: 4 · Written at 8:14:53 PM on 22 June 2021.
Marcc's avatar
 Marcc
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5389

Beware of R6 feeding the screens. That one in earlier models was two parallel 22K resistors. I have seen a few examples where "I" squared R wins with the 10K resistor as the current draw of the screens exceeds one watt. It then fries.

Marc
 
« Back · 1 · Next »
 You need to be a member to post comments on this forum.

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.

Vintage Radio and Television is proudly brought to you by an era where things were built with pride and made to last.

DISCLAIMER: Valve radios and televisions contain voltages that can deliver lethal shocks. You should not attempt to work on a valve radio or other electrical appliances unless you know exactly what you are doing and have gained some experience with electronics and working around high voltages. The owner, administrators and staff of Vintage Radio & Television will accept no liability for any damage, injury or loss of life that comes as a result of your use or mis-use of information on this website. Please read our Safety Warning before using this website.

WARNING: Under no circumstances should you ever apply power to a vintage radio, television or other electrical appliance you have acquired without first having it checked and serviced by an experienced person. Also, at no time should any appliance be connected to an electricity supply if the power cord is damaged. If in doubt, do not apply power.

Shintara - Keepin' It Real · VileSilencer - Maintain The Rage