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 Hotpoint/ Columbus 653 A
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 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: 6687

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: 6687

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: 6687

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.
 
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