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

 Hotpoint/ Columbus 653 A
« Back · 1 · Next »
 Return to top of page · Post #: 1 · Written at 1:13:18 PM on 28 April 2012.
Sandbar40's Gravatar
 Sandbar40
 Location: Tauranga, NZ
 Member since 13 July 2010
 Member #: 695
 Postcount: 35

Looking for a circuit for this model.

AC/ DC portable in maroon and cream plastic case, made by Radio corp NZ (Columbus }.

Valve line up, 1T4 1R5 1T4 1S5 3V4 6X4

Grateful for any info.
 
 Return to top of page · Post #: 2 · Written at 2:57:42 PM on 28 April 2012.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6761

I don't have a schematic for that particular model, although I have the following Hotpoints:

1950 K75MA
1953 M76MA
1954 P75MAR

... with the same valve line-up.

Have you tried the NZVRS?

http://www.nzvrs.pl.net/.
 
 Return to top of page · Post #: 3 · Written at 7:56:21 AM on 29 April 2012.
Sandbar40's Gravatar
 Sandbar40
 Location: Tauranga, NZ
 Member since 13 July 2010
 Member #: 695
 Postcount: 35

Thanks GTC, have tried NZVRS but they only had a 502 model.

This set has a 5 position switch on the side, labelled,
' activate - AC - off - save - full.
 
 Return to top of page · Post #: 4 · Written at 3:29:03 PM on 29 April 2012.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6761

I don't think I have what you're looking for, but I may have something close enough to be useful.

What size speaker: 4" or 6"?

What is the A and B battery configuration (voltages and number of cells)?

On the power transformer are there any taps on the primary side, and if so what are they?
 
 Return to top of page · Post #: 5 · Written at 8:29:43 AM on 30 April 2012.
Sandbar40's Gravatar
 Sandbar40
 Location: Tauranga, NZ
 Member since 13 July 2010
 Member #: 695
 Postcount: 35

Speaker is 6"

No batteries in set but sticker shows LT as'765' probably 7.5 volt, and HT 490 P probably 90 volt.

Primary of trans has no taps, is only connected to mains with sw. in ' activate ' or ' Ac ' positions.

Secondary has single ht winding - no CT, and there is a 6.3 volt winding for the 6X4 and pilot lamp.
 
 Return to top of page · Post #: 6 · Written at 6:18:51 PM on 30 April 2012.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6761

Unfortunately, none of the candidate Hotpoint schematics I have fit those characteristics.

There is an AWA 653P with that valve line-up, but it has a CT on the 6.3v winding and the pilot lamp is between the CT and earth. Tranny has multi-tapped primary. A battery is 9v, B battery is 90v. Speaker is connected via a round 3-pin plug.
 
« 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