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This page is intended to help people who are seeking or offering assistance with matters relating to BBC engineering. To contact the originator of an item below, click the link in the relevant section.  I will forward your email to the intended recipient. Let me know if you would like an entry on the page.

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Date inserted Title

7 Current items                         Click for: 52 Resolved items and 89 Expired items

5 Jul 2020 ED Specs

Peter O'Shea would appreciate copies of the following Equipment Department specifications:-
 

ED112 Cables & Wires, General Specification

ED120 Technical Equipment, General Specification

ED121 General Conditions of Contract

ED138 Anodised Finish (i.e. for metallic materials treatments on alu. housings- Iím sure like most companies this is going to closely resemble DEF STAN 03-24/25 and the BS of the time)

ED139 Requirements for the Manufacture of Printed Wiring Boards (includes the PCB Photostat process)

ED141 Requirements for the Gold Plating of Edge Contacts on Printed Wiring Boards

ED143 Wiring Techniques Utilising Solderless Wrapped Joints

ED155 Requirements for solder Resist and Component Placement Legends on Printed Wiring Boards

ED2200 Equipment Department Finishes, General Specification Series (I believe this doc has the BBC 'Grey' electronic equpt. spec in it)

ED3002 Insulating Tubing and Sleeving

15 Jun 2020 Uher Report Monitor - speed mods David McMahon writes:  "Does anybody have the detailed information on how to convert a BBC modified single speed (7.5 ips) Uher Report Monitor portable tape recorder back to a standard 4 speed machine.

I know roughly the main areas:-

1. Speed change control shaft (cut off) to be re-instated, how (just new shaft or new speed control), where can shaft/control/control knob be obtained ?

2. Speed control micro switches rewiring (K5/K6/K8).

3. Double Start micro switch (K4) back to single switch.

4. Double Rewind micro switch (K7) back to single switch.

5. Cut track on main circuit board to be re-instated.

Note - the document on various web sites detailing the BBC modifications to the Uher Report IC & L models does not appear to touch upon the fixed speed modifications."

30 Mar 2020 DD Report from 1949 - Swarf removal John Lancaster is desperately trying to find a BBC Designs Report. Number I.5 (49). It is in relation to swarf removal on disc recording systems and is referenced in Technical Instruction R4, page 22.

Any help at all would be greatly appreciated.

12 Dec 2019 MW Tx in Central London Jeff Cohen (ex-TCPD and other parts of the BBC) has never seen it mentioned anywhere but recalls that in the 1960s there was still a low power MW transmitter in central London (possibly on 719 kHz) used for radiating cue programme to OBs. He says it always seemed odd to use MW when VHF links were available from Swains Lane.  Please click on the link if you have more information about this.
2 Jun 2019 BBC specification TV80 Brian Summers says, further to his post dated 13 Feb 2019 (below), that the MCR21 restoration is now under way.

One of the many things he is looking for is the original BBC specification TV80 which is proving hard to find.

Current Newsletters can be downloaded here:- https://bttt.org.uk/newsletter-archive/ 

There is much else to find, the wish list is here:- http://mcr21.org.uk/get-involved/wish-list/ 

There were 10 of these OB vans made used in London and the regions. He would love to hear from anyone who worked on any of them.  Please get in touch.

25 May 2019 Painton rotary attenuators Guy Stanbury is seeking technical information on two Painton rotary attenuators acquired at a recent vintage radio dispersal. He believes they may be early broadcast (BBC) studio equipment. The type numbers are PB20-M2G, PO/2E1. Any/all help would be greatly appreciated.
29 Apr 2019 Emley Moor Mike Pearson is an independent film maker researching a social history documentary about the lifestyles of BBC and IBA TV Transmitter Engineers in the Huddersfield and Belmont area in the 50s, 60s and 70s, including when the Emley Moor mast collapsed.

He is also interested in the Eagle Tower used to restore BBC2 at Emley Moor, and any riggers' experiences with tubular masts or the galloping guy phenomenon.

Mike would also like to hear from anyone evacuated from Belmont or Winter Hill (following Emley's collapse), anyone who has pictures of the 150 tons of chains subsequently suspended in those tubular masts, and anyone from Waltham which also toppled in 1966.

If you can provide any information please get in touch.  Mike's father Peter Smith Pearson worked at Emley Moor and made a cine film of the tubular mast being painted.

     
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