Grampian Type 506 Radio Receiver - UK Vintage Radio Repair and Restoration Discussion Forum

Zelandeth · 23rd Jun 2010, 10:56 pm

(Mods...please feel free to shift this thread if it's not in the right place...it's not really a domestic radio set though...so didn't seem to be at home in that section).

Picked this up today along with a few other bits and pieces...and didn't actually realise it came as part of the lot.

This little brown box however I had initially thought was a test instrument of some sort, until I actually looked at the face of it! Looks instead like it's a radio receiver for hooking up to a PA system of some description. Supermarket? Restaurant?

There doesn't seem to be any listing for Grampian on the service data site, so I just wondered if anyone had any info on the company, this unit, and its likely use.

Valve line up is: UCH42, UAF42 (x2), UY41 (x2), UL41 (x2).

Any info would be gratefully received!

AC/HL · 23rd Jun 2010, 11:58 pm

It appears to be a self contained tuner-amplifier, not part of a bigger system.

Lucien Nunes · 24th Jun 2010, 12:52 am

Here it is in a 1951 price list - I don't have a catalogue page for it at hand. It's the sort of unit that would have been used to receive schools broadcasts etc, ideal where the functions of a normal radio were required but with greater durability and portability.

The input socket allowed a stand-alone gram deck to be connected, e.g. in the school application to play music for gym; the mains socket on the rear panel would presumably have been included for convenience in connecting this. Alternatively a mic could be used for speech reinforcement in small halls.

It seems to have a high impedance tapping on the output transformer, as with most PA equipment, to cater for distant or multiple speakers. Even with its modest 8W output, a pair of small horns tapped at a few watts each, could cover a reasonable number of listeners for speech-only programs.

Lucien

23rd Jun 2010, 10:56 pm	#1
Zelandeth Heptode Join Date: Jun 2006 Location: Milton Keynes, Buckinghamshire, UK. Posts: 931	Grampian Type 506 Radio Receiver (Mods...please feel free to shift this thread if it's not in the right place...it's not really a domestic radio set though...so didn't seem to be at home in that section). Picked this up today along with a few other bits and pieces...and didn't actually realise it came as part of the lot. This little brown box however I had initially thought was a test instrument of some sort, until I actually looked at the face of it! Looks instead like it's a radio receiver for hooking up to a PA system of some description. Supermarket? Restaurant? There doesn't seem to be any listing for Grampian on the service data site, so I just wondered if anyone had any info on the company, this unit, and its likely use. Valve line up is: UCH42, UAF42 (x2), UY41 (x2), UL41 (x2). Any info would be gratefully received! Attached Thumbnails __________________ Zel's Lair - A random bag of vintage tech, lighting information and other assorted geekery Last edited by Zelandeth; 23rd Jun 2010 at 11:00 pm. Reason: Removed a bit of irrelevant info.

23rd Jun 2010, 11:58 pm	#2
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,642	Re: Grampian Type 506 Radio Receiver It appears to be a self contained tuner-amplifier, not part of a bigger system.

24th Jun 2010, 12:52 am	#3
Lucien Nunes Rest in Peace Join Date: Apr 2008 Location: London, UK. Posts: 2,508	Re: Grampian Type 506 Radio Receiver Here it is in a 1951 price list - I don't have a catalogue page for it at hand. It's the sort of unit that would have been used to receive schools broadcasts etc, ideal where the functions of a normal radio were required but with greater durability and portability. The input socket allowed a stand-alone gram deck to be connected, e.g. in the school application to play music for gym; the mains socket on the rear panel would presumably have been included for convenience in connecting this. Alternatively a mic could be used for speech reinforcement in small halls. It seems to have a high impedance tapping on the output transformer, as with most PA equipment, to cater for distant or multiple speakers. Even with its modest 8W output, a pair of small horns tapped at a few watts each, could cover a reasonable number of listeners for speech-only programs. Lucien Attached Thumbnails