Hi, Tom,
I'm fairly certain that the three modules that look fully professional
are from a recording/broadcast console.
The unit with the ventilated cover and the binding posts looks a little
more home-brew. It has five-way binding posts that would be used for
speaker outputs, but I don't ever recall seeing them in an RCA, Gates,
or McCurdy console of the era unless it was a user modification.
So, I don't know what the front right box with the snaking power cord is.
As to the three modules, there is not enough resolution in the scan (or
the original image) to identify the connector type, but it is in keeping
with the Amphenol Blue Ribbon connector which was common in the 1950s
through the early 1970s for module connections.
McCurdy used this on some of their gear into the mid-to-late 1970s,
especially for tray-mount power amplifiers. The tray-mount concept was
based on the need for instant replacement should a module fail so that
you could stay on the air.
The full-sized Amphenol Blue Ribbon connector was quite a beast. Some
were last seen in Neil Muncy's collection. They could be for
chassis-to-chassis connections or chassis-to-cable connections.
In the 1950s or 1960s, these morphed into the Micro Ribbon connector
which then came to be made with both solder and mass insulation
displacement terminations. They were what The Bell System adopted in the
50-position, right-angle version for the six-button, nominally five-line
key telephone sets, that worked with the 1A2 Key System Units. For more
lines they ran more cables. In the 1970s, 25-pair "Telco" cable was a
widely used commodity in the broadcast world as well. There were few
mass connection systems that were less costly.
http://bit.ly/17k3sgA
The last incarnation of the micro-ribbon that was widespread was the
36-position version used for the "Centronics" parallel printer interface.
It is also the connector series used for the remote control and other
rear-panel connectors as well as the head block assembly on the Studer
A80. You can bet that I bought some spares. I suspect that these will
dry up in the next ten years in mainstream distributor channels. I saw
signs of longer lead time and special order for some parts already when
I ordered my box of spares about four years ago now.
Cheers,
Richard
On 2015-02-20 1:13 PM, Tom Fine wrote:
> 3. I am not 100% sure of this, but I think the components shown on the
> cover of Hi-Fi Fiedler:
> http://www.shadeddog.com/images/rca_lsc-2100.jpg
> are not at all from a hi-fi system, but rather are modules from an RCA
> recording or broadcast console. I can't tell if the speaker shown in an
> Altec Duplex woofer/horn or an RCA speaker.
--
Richard L. Hess email: [log in to unmask]
Aurora, Ontario, Canada 647 479 2800
http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.
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