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 Peerless Reproducer Model no B 24625
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 Return to top of page · Post #: 1 · Written at 6:28:06 PM on 3 November 2019.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 1574

Got this little reproducer from one of the HRSA auctions . It is in great working order . I thought its worth a thorough going over. Photos sent today .
I think they did not come up with the name "Speaker" for some time after this. I just find the workings so amazing.

Peerless Reproducer Loudspeaker
Peerless Reproducer Loudspeaker
Peerless Reproducer Loudspeaker
Peerless Reproducer Loudspeaker
Peerless Reproducer Loudspeaker
Peerless Reproducer Loudspeaker


 
 Return to top of page · Post #: 2 · Written at 8:53:42 PM on 3 November 2019.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6348

Photos uploaded.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 3 · Written at 10:21:42 PM on 3 November 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 4339

One will tend to find that the Horn type were "sound reproducers" and referred to as speakers, with the introduction of the driven cone, with great fanfare by the likes of Stromberg -Carlson, who in 1926 promoted the fact that a companion to their No 601 receiver was a new "Cone Speaker". That would have been possibly based on the Western Electric one.

I serviced an "All American Mohawk" of 1928. Most interesting set (have photo's) speaker assy 10Kg Chassis around 20+Kg (did weigh it) AC filaments with genuine "Humdingers" on the filaments. Fascinating phase fault on them caused by corrosive rivets. Eight tubes.

Speaker is one of the first "Rice-Kellogg" modern moving coil one's with a field coil, rather than the "Rocking Armature" as Carl has. It has been re-coned with a Foam mount. Fantastic sound multi stage TRF. OP is a now extremely expensive #50. Grid bias for it was a #24 wired as a rectifier (-84V .450V plate) 4.6 Watt OP.


 
 Return to top of page · Post #: 4 · Written at 6:37:47 PM on 4 November 2019.
Muzzery's Gravatar
 Location: Maleny, QLD
 Member since 28 February 2018
 Member #: 2218
 Postcount: 95

I would greatly like to get some kind of period correct speaker for my 1922 ericcson 4 valve one day. Not much choice up here in Qld as far as I can see. That one looks great Carl


 
 Return to top of page · Post #: 5 · Written at 9:03:27 AM on 5 November 2019.
Simplex's Gravatar
 Location: Bathurst, NSW
 Member since 7 August 2008
 Member #: 336
 Postcount: 336

The Peerless looks to be in excellent condition, far better than the "reproducer" of a different make I have.

Same sort of driver, rocking arm ? but mine is in a rather shabby condition. The driver coil and matching transformer measure out ok with a ohmeter however would need a full stripdown and clean.

Only get a faint sound when hooked up to a 3 valve regen set I made even with strong signals.

Will be quite an exercise to pull the driver to pieces and clean it up. Have been rather hesitant to do anything as a pretty complex device and concerned I might damage something.


 
 Return to top of page · Post #: 6 · Written at 10:55:21 AM on 5 November 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 4339

The balanced armature speaker is somewhat the same as a rocking armature microphone used in Phones. I have a Peter Lankshear article (for one) and their operation is rather simple with few actual moving parts.

As I see it the stiffness of the cone can be an issue and the pivot of the armature another. I have no doubt that the strength of the magnet is another. Some like Carls may use a flexible coupling rod of rubber, that can harden.

I would be tempted to insulation test primary to secondary on the transformer, as I have seen that old lacquer coating fail.


 
 Return to top of page · Post #: 7 · Written at 7:39:16 PM on 5 November 2019.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 881

Fascinating device. Now there is a challenge , make one as a project.
I might give it a go.
Fred.


 
 Return to top of page · Post #: 8 · Written at 10:05:05 PM on 5 November 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 4339

That could be made as an electrodynamic, but with the strength & higher flux density of some of the Magnets of today there is the possibility that it would be a lot more sensitive.

Marc


 
 Return to top of page · Post #: 9 · Written at 3:28:31 AM on 13 November 2019.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 1574

Well I got the time to finish this baby last weekend and I have sent the photos to Brad. Its good for another 80 odd years now.
There are a few threads hanging out the seam at the back. Nothing a razor blade wont remove.

Unknown Loudspeaker
Unknown Loudspeaker


 
 Return to top of page · Post #: 10 · Written at 8:18:28 PM on 14 November 2019.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6348

Photos uploaded to Post 9.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
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