UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Amateur and Military Radio

Notices

Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

Closed Thread
 
Thread Tools
Old 20th Jan 2018, 12:18 am   #1
JanWra1
Triode
 
Join Date: Jan 2018
Location: Stockholm, Sweden
Posts: 48
Default AR88 enclosed tools

Hi Everybody
Being new to the forum I have a question for all you fans of RCA's AR88:

I know that some tools were shipped with the radio when new among which was an Allen key but there were also som trimming tools. Does anyone have more info and/or some pictures of these parts?

I used to have an AR88D in the 60's and today I am planing to buy another and like it to be as complete as possible.

Jan
JanWra1 is offline  
Old 20th Jan 2018, 3:32 am   #2
Kevin Hoyland
Hexode
 
Join Date: Feb 2009
Location: Rotherham, South Yorkshire, UK.
Posts: 330
Default Re: AR88 enclosed tools

Morning Jan.
Welcome to the Forum.
You can see the two Trimming tools in the photo, I hope this will help you, I have 2 AR88D/ 1 CR91/ and 1 AR88LF.
Regards

Kevin
Attached Thumbnails
Click image for larger version

Name:	20170825_111324.jpg
Views:	255
Size:	68.4 KB
ID:	155776  

Last edited by Kevin Hoyland; 20th Jan 2018 at 3:39 am.
Kevin Hoyland is offline  
Old 20th Jan 2018, 10:33 am   #3
JanWra1
Triode
 
Join Date: Jan 2018
Location: Stockholm, Sweden
Posts: 48
Default Re: AR88 enclosed tools

Hi Kevin

Thanks for the picture with the tools, can you give some more details (dimensions and material) and possibly some picture o the business end of the trimming tools?

Jan
JanWra1 is offline  
Old 20th Jan 2018, 11:33 am   #4
beamcurrent
Hexode
 
beamcurrent's Avatar
 
Join Date: Mar 2008
Location: Camberley, Surrey, UK.
Posts: 426
Default Re: AR88 enclosed tools

Jan

It's harder to find the tools than an AR88! The "allen" key was a American "spline" tool, the name for it eludes me!! it was for the grub screws in the knobs.

In Kevin's picture, the tuning box cover has been removed to reveal the tools, make sure you get this as well. There have been many threads re AR88 maintenance, but perhaps the most important is to check/change the output valve grid coupling capacitor as failure will lead to the loss of the output transformer.

I have two AR88s, my best set was supplied to the BBC monitoring service about 1942 and I have the acceptance engineers notes including his thoughts on RCA standard alignment. The second one is a rather grubby example held in reserve.
__________________
Regards Brian

Visit the Virtual Broadcast TV Camera Museum
beamcurrent is offline  
Old 20th Jan 2018, 12:00 pm   #5
ms660
Dekatron
 
ms660's Avatar
 
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 7,015
Default Re: AR88 enclosed tools

Bristol wrench?

Lawrence.
ms660 is offline  
Old 20th Jan 2018, 12:34 pm   #6
Radio Wrangler
Dekatron
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 10,941
Default Re: AR88 enclosed tools

I posted photos of the ends of the AR88 tools on here some years ago.

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is online now  
Old 20th Jan 2018, 3:40 pm   #7
camallison
Hexode
 
camallison's Avatar
 
Join Date: Feb 2013
Location: Yarm, North Yorkshire, UK.
Posts: 390
Default Re: AR88 enclosed tools

Bristol wrench - https://bristolwrench.com/bristol-wr...ve-parts-list/

There are sets of them advertised on ebay.co.uk

Colin

Last edited by camallison; 20th Jan 2018 at 3:41 pm. Reason: Spolling!
camallison is offline  
Old 20th Jan 2018, 7:20 pm   #8
JanWra1
Triode
 
Join Date: Jan 2018
Location: Stockholm, Sweden
Posts: 48
Default Re: AR88 enclosed tools

Thanks everyone for your inputs, I have now managed to find the pictures posted by David - nice work.

Jan
JanWra1 is offline  
Old 21st Jan 2018, 1:27 am   #9
Silicon
Heptode
 
Join Date: Jun 2007
Location: Coulsdon, London, UK.
Posts: 877
Default Re: AR88 enclosed tools

A 2mm Allen key (Hex wrench) is a good fit in my RCA knobs.
Silicon is offline  
Old 21st Jan 2018, 1:21 pm   #10
HamishBoxer
Dekatron
 
HamishBoxer's Avatar
 
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 6,169
Default Re: AR88 enclosed tools

Bristol wrench is correct,I bought a set off Ebay from the states.
__________________
G8JET BVWS Member and V.M.A.R.S
HamishBoxer is offline  
Old 18th Feb 2018, 11:59 pm   #11
JanWra1
Triode
 
Join Date: Jan 2018
Location: Stockholm, Sweden
Posts: 48
Default Re: AR88 enclosed tools

Just bought an AR88D in very good condition with a nonfunctioning S-meter( according to the seller), a speaker. and much to my surprize it came with both the trimming tools and the Allen wrench. Both the radion and the speaker are dated 1944.
The S-meter just need a twist of the adjustment pot to work!
Jan
JanWra1 is offline  
Old 19th Feb 2018, 7:34 am   #12
Kevin Hoyland
Hexode
 
Join Date: Feb 2009
Location: Rotherham, South Yorkshire, UK.
Posts: 330
Default Re: AR88 enclosed tools

Morning Jan will you please put photos on of your AR88.

Kevin.
Kevin Hoyland is offline  
Old 19th Feb 2018, 9:15 am   #13
Radio1950
Pentode
 
Join Date: Apr 2017
Location: Brisbane, Queensland, Australia.
Posts: 145
Default Re: AR88 enclosed tools

Jan, I can assist in your workshop cleanup.
I can dump that AR88 for you.
Day or night.

Mike
Radio1950 is offline  
Old 19th Feb 2018, 10:01 am   #14
JanWra1
Triode
 
Join Date: Jan 2018
Location: Stockholm, Sweden
Posts: 48
Default Re: AR88 enclosed tools

Will add pictures in a few weeks time

Jan
JanWra1 is offline  
Old 19th Feb 2018, 10:09 am   #15
Radio Wrangler
Dekatron
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 10,941
Default Re: AR88 enclosed tools

Jan, there are two critically important thing you should do to your AR88:

1) Check/replace the coupling capacitor from the anode of the 6SJ7 to the grid of the 6V6. They go leaky, turn the 6V6 hard on and burn out the audio transformer.

2) consider bridging the 'trans' position on the mode switch. As original it disconnects the HT feed to the set and lets the HT voltage go very high. It over stresses the PSU and you get a loud crack when moving the switch into the next position.

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is online now  
Old 20th Feb 2018, 12:35 pm   #16
JanWra1
Triode
 
Join Date: Jan 2018
Location: Stockholm, Sweden
Posts: 48
Default Re: AR88 enclosed tools

David

Thanks for the tips,
- Re C118+C122 they were replaced by a 10 nF by a previous owner.
- Re bridging the "Trans"- pos - for the time being I use an extension cord with a switch,

Jan
JanWra1 is offline  
Old 20th Feb 2018, 5:06 pm   #17
G6Tanuki
Dekatron
 
G6Tanuki's Avatar
 
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 6,526
Default Re: AR88 enclosed tools

I've heard it alleged that the reason the trimming-tools for AR88s are so rare is that they were removed from receivers delivered to certain government establishments as a way to stop unauthorised twiddling!
G6Tanuki is offline  
Old 20th Feb 2018, 10:33 pm   #18
Radio1950
Pentode
 
Join Date: Apr 2017
Location: Brisbane, Queensland, Australia.
Posts: 145
Default Re: AR88 enclosed tools

Hi Jan

here's a few AR88s and two HROs at a "certain government establishment" that we know as Bletchley Park in UK.
FYI.
Good luck with yours.
Attached Thumbnails
Click image for larger version

Name:	BP AR88s HRO P1020632 2Kx.jpg
Views:	73
Size:	78.7 KB
ID:	157879  
Radio1950 is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 10:29 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright ©2002 - 2018, Paul Stenning.