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 HMV stereogram unknown model... please help.
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 Return to top of page · Post #: 1 · Written at 7:43:06 AM on 16 June 2013.
MikeGS's Gravatar
 Location: Melbourne, VIC
 Member since 15 June 2013
 Member #: 1364
 Postcount: 15

I have just picked up this HMV unit and can not find anything indicating which model it is. Can someone point me in the right direction. I'm hoping there is a Web site that I could go to that would list most or all Australian models with pictures. I have provided links to photos for people to look at. Any help would be greatly appreciated.

HMV Stereogram Radiogram
HMV Stereogram Radiogram


 
 Return to top of page · Post #: 2 · Written at 8:36:22 AM on 16 June 2013.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 4322

G'day Mike,

You can display photos or links to them by either using a photo hosting service or simply e-mail the photos to me and I'll embed them with your comments.

My e-mail address is on my profile page, just click my username to get there.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
Brad.

A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 3 · Written at 12:34:59 PM on 16 June 2013.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 3919

Let us know the valve line-up in it. That can often help whittle down the choices.


 
 Return to top of page · Post #: 4 · Written at 12:36:36 PM on 17 June 2013.
MikeGS's Gravatar
 Location: Melbourne, VIC
 Member since 15 June 2013
 Member #: 1364
 Postcount: 15

The backing on the cabinet is stapled on. Could this mean that the unit has been refurbed at some stage or would this be normal for a 60's-ish stereogram? After peering through one of the holes in the backing I found a piece of paper stapled to the inside of the cabinet.

V1-6AN7
V2-6N8
V3-6GW8
V4-6GW8

There is also a number in the bottom right hand corner of the piece of paper. "683-2611" . I Googled it and came up with nothing.

Image Link


 
 Return to top of page · Post #: 5 · Written at 5:01:44 PM on 17 June 2013.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 906

Not sure of the model, but the chassis is a N3. The model number will be N3-?? These chassis were found in various HMV grams. I do have a circuit diagram for the N3. If you click on to my profile you'll find my email and I'll send you a copy. I will be able to tell you the exact model number, but not straight away.

Cheers.


 
 Return to top of page · Post #: 6 · Written at 6:13:54 PM on 17 June 2013.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 3919

I have a schematic and service notes for what is termed HMV Model N3 and which matches the valve line-up. The notes contain a diagram that mirrors the one on the inside of your case, other than the drawing reference number (bottom right) is 683-1721 and I think yours is different -- however that may not be significant.


 
 Return to top of page · Post #: 7 · Written at 7:16:16 PM on 17 June 2013.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 906

N3 service manual sent. Is yours a HMV "Lyric"? The "Lyric is a Model N3-4Z". The N3-4Y is a HMV "Caprice".

Cheers.


 
 Return to top of page · Post #: 8 · Written at 9:23:54 PM on 17 June 2013.
MikeGS's Gravatar
 Location: Melbourne, VIC
 Member since 15 June 2013
 Member #: 1364
 Postcount: 15

Thanks GTC, but I now have a copy of the manual.
Monochrome625, I don't think it is a Lyric or Caprice. In the top left corner on the front is a badge that says "High fidelity" just below the HMV badge. It also has a strip badge across the front towards the bottom that says "Stereo by HMV". There are no other badges.


 
 Return to top of page · Post #: 9 · Written at 9:42:01 PM on 17 June 2013.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 906

Yes, I know it is not the Caprice. I have the page for that one. Don't worry I'll find out what it is and will let you know.

Cheers.


 
 Return to top of page · Post #: 10 · Written at 9:44:22 PM on 17 June 2013.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 3919

^ The one chassis has served numerous cabinet styles it seems.


 
 Return to top of page · Post #: 11 · Written at 2:52:26 PM on 22 June 2013.
NewVista's avatar
 Location: MilwWI, US
 Member since 10 May 2013
 Member #: 1340
 Postcount: 375

What are the speakers? Magnavox 12WR's?


 
 Return to top of page · Post #: 12 · Written at 7:33:40 PM on 22 June 2013.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 906

Here is a Ebay listing for a HMV Caprice (N3-4Y)

http://www.ebay.com.au/itm/HMV-RADIOGRAM-VALVE-record-player-radio-retro-1965-NOT-WORKING-/....

It has the same chassis and is the little brother of MikeGS's, as shown above.

Cheers.


 
 Return to top of page · Post #: 13 · Written at 5:30:52 PM on 23 June 2013.
MikeGS's Gravatar
 Location: Melbourne, VIC
 Member since 15 June 2013
 Member #: 1364
 Postcount: 15

No, the speakers are not Magnavox. They are Plessey. Here are pictures of them.

Image Link
Image Link


 
 Return to top of page · Post #: 14 · Written at 8:55:26 AM on 24 June 2013.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 906

These are not the orignal speakers for this unit. HMV usually used Magnavox speakers.

The speakers are a Rola Plessey, type C8M (15 ohms). They a basically a Rola speaker, made in the Rola factory after Plessey took over.

Extract from Loudspeaker Data, Alnico & Ferrite models, Plessey Components Australia, Rola Division, The Boulevard, Richmond, Victoria:-

Data for C8M as follows:

Power handling peak rating - 10 watts.
Fundamental resonance - 75 Hz.
Frequency response - 70 Hz/8 KHz.
Voice coil impedance - 2 or 15 ohms at 400 hz.
Air gap flux density - 9700 (gauss).
Gap flux - 37000 (lines).

Dimensions:

Diaphragm housing diam - 8 1/16" (205 mm).
Baffle opening diam - 7 1/16" (180 mm).
Depth, pad ring to rear - 2 27/32" (72 mm).
Voice coil diam - 1" (26 mm).

Mounting:

Four 5/16" (8 mm) X 7/32" (6 mm) slots spaced 90 degrees on 7 19/32" (15 mm) pitch diam.


 
 Return to top of page · Post #: 15 · Written at 9:35:03 AM on 24 June 2013.
MikeGS's Gravatar
 Location: Melbourne, VIC
 Member since 15 June 2013
 Member #: 1364
 Postcount: 15

Ahh OK. As I suspected. The unit has been refurbished at some stage.


 
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