B40 question - UK Vintage Radio Repair and Restoration Discussion Forum

ms660 · 15th Jun 2011, 4:22 pm

Does any one know wether the plastic window on the rear of the Xtal door is clear or coloured as mine aint there.
Cheers.

M0FYA Andy · 15th Jun 2011, 5:02 pm

Yes, I know which it is..............

It's coloured................

I'll bet you want to know what colour it is as well!

It's red.

Andy

ms660 · 15th Jun 2011, 5:06 pm

Nice one Andy, many thanks.

Lawrence.

QWENIX · 15th Jun 2011, 9:24 pm

Its glued on the x-tal oven door.

Maybe if you are lucky: open up the receiver and put it upside down (heavy) maybe it drops out . It has happened a few times to a couple of my receivers.

This can also happen to the small glass window above the dial knob.

best regards

Qwenix

Alistair D · 15th Jun 2011, 9:33 pm

"(heavy)" I seem to remember my B40C weighed in at 112lbs or 50kilos in new money.

I wish I had never sold that receiver. If anyone comes across a B40C fitted with an R1155 two speed reduction drive, it was mine.

Al

ms660 · 15th Jun 2011, 10:09 pm

Quenix... thanks for the tip...nothing found..had a look a while back..only bits of Lego!

Alister...I'm thinking a block and tackle above the kitchen table! neat idea with the R 1155 drive, I stripped all the tuning drive and scale drive a couple of weeks agoon the B40 to try and address some backlash problems, the top gearbox was a bit of a pain to remove without snapping the ceramic TC shaft, cleaned all gears and advanced the split gears an extra tooth on the springs before refitting as beforhand the split gears were more or less lining up their teeth when engaged ie: hardly any anti backlash tension, backlash now reduced from 5 divisions to 1.5 divisions!
The B40d is permenantly on the kitchen table as is the fully cased AR88, I have no intention of moving either of them.
Thanks for the replies.
Cheers.

"Stupidity is the most common element on the planet"

QWENIX · 16th Jun 2011, 7:15 am

talking about weight: I do have 11 receivers B40/B41/62B murphy combination and a couple of Racal RA17L all in the loft so 11x50kgs+2x37 kgs ....... If you search for my name or subject on racal or b40 then you will come across my picture of a cabinet trying to withstand the gravity force.

best regards

Qwenix

HamishBoxer · 16th Jun 2011, 11:03 am

Hope the loft timbers have been strengthened !

David

15th Jun 2011, 4:22 pm	#1
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	B40 question Does any one know wether the plastic window on the rear of the Xtal door is clear or coloured as mine aint there. Cheers.

15th Jun 2011, 5:02 pm	#2
M0FYA Andy Nonode Join Date: May 2007 Location: Preston, Lancashire, UK. Posts: 2,511	Re: B40 question Yes, I know which it is.............. It's coloured................ I'll bet you want to know what colour it is as well! It's red. Andy

15th Jun 2011, 5:06 pm	#3
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: B40 question Nice one Andy, many thanks. Lawrence.

15th Jun 2011, 9:24 pm	#4
QWENIX Pentode Join Date: Jan 2006 Location: Amsterdam, The Netherlands Posts: 180	Re: B40 question Its glued on the x-tal oven door. Maybe if you are lucky: open up the receiver and put it upside down (heavy) maybe it drops out . It has happened a few times to a couple of my receivers. This can also happen to the small glass window above the dial knob. best regards Qwenix

15th Jun 2011, 9:33 pm	#5
Alistair D Nonode Join Date: Jan 2010 Location: Edinburgh, UK. Posts: 2,008	Re: B40 question "(heavy)" I seem to remember my B40C weighed in at 112lbs or 50kilos in new money. I wish I had never sold that receiver. If anyone comes across a B40C fitted with an R1155 two speed reduction drive, it was mine. Al __________________ I won't tell you how I discovered that.

15th Jun 2011, 10:09 pm	#6
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: B40 question Quenix... thanks for the tip...nothing found..had a look a while back..only bits of Lego! Alister...I'm thinking a block and tackle above the kitchen table! neat idea with the R 1155 drive, I stripped all the tuning drive and scale drive a couple of weeks agoon the B40 to try and address some backlash problems, the top gearbox was a bit of a pain to remove without snapping the ceramic TC shaft, cleaned all gears and advanced the split gears an extra tooth on the springs before refitting as beforhand the split gears were more or less lining up their teeth when engaged ie: hardly any anti backlash tension, backlash now reduced from 5 divisions to 1.5 divisions! The B40d is permenantly on the kitchen table as is the fully cased AR88, I have no intention of moving either of them. Thanks for the replies. Cheers. "Stupidity is the most common element on the planet"

16th Jun 2011, 7:15 am	#7
QWENIX Pentode Join Date: Jan 2006 Location: Amsterdam, The Netherlands Posts: 180	Re: B40 question talking about weight: I do have 11 receivers B40/B41/62B murphy combination and a couple of Racal RA17L all in the loft so 11x50kgs+2x37 kgs ....... If you search for my name or subject on racal or b40 then you will come across my picture of a cabinet trying to withstand the gravity force. best regards Qwenix

16th Jun 2011, 11:03 am	#8
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: B40 question Hope the loft timbers have been strengthened ! David