Ever Ready 5008 AC/DC - UK Vintage Radio Repair and Restoration Discussion Forum

Brian4radio · 5th Sep 2008, 2:47 pm

Hi team, I am refurbing an Eveready 5008 AC/DC set circa 1935.
The valve line up on the cct diagram is as follows TP2620, VP1321 and a PENDD 4020. Fitted in the set instead of the VP1321 is a VP13B, I can't find any info on the VP13B, is it a straight swap or are there a few component changes to make it work

. At the moment I have garbled speach on strong stations and very poor sensitivity/selectivity on medium band. regards Brian.

petervk2mlg · 5th Sep 2008, 3:13 pm

My Brahns Vademecum indicates that while the 2 valves are similar, they have different bases.
The VP1321 has an anode on the top cap, while the VP13B has the grid on top.
Peter

Brian4radio · 5th Sep 2008, 10:53 pm

Hi Peter, thanks for that info. I will have to check the wiring around the Vp1321 valve. I must say that the set is working after a fashion so the wiring must have been changed to suit the rogue valve in the past. I will investigate further. regards Brian.

Brian4radio · 8th Sep 2008, 9:30 am

Hi Team, I have checked the wiring around the VP13B valve and sure enough as Peter suggested the anode connection and grid connection have been swapped over in the distant past. This leaves me with the original fault. The set only partially works, with only whistles on the medium band and garbled speech on the long wave(radio 4). I have not disturbed the I/F stages, should I alter any of the component values around the VP13B valve

to make it more compatable. Regards Brian.

Pete_kaye · 8th Sep 2008, 7:45 pm

Any chance of some photos? I have an Ever Ready mains set from about 1936.It is 'trf' ac/dc and uses some of the same valves as yours.I have never been able to find a circuit for it.There is a Superhet in a similar wooden case ,known as the 5010-what is yours?

ukcol · 8th Sep 2008, 8:15 pm

Hi Peter,

Just a thought - If the valve substitution was an unofficial modification, the change in layout may have made the set prone to instabilty. It may be worth trying to get a VP1321 and putting the set back to its original state.

Brian4radio · 8th Sep 2008, 8:50 pm

Hi Pete, I think Eveready only made a few AC/DC prewar sets i.e. 5008, 5013 (VP13C, HL13C, PEN36Cand a UR1C), 5017 (SIMILAR LINE UP)and a 5221(TH30C, VP13C, 2D13C, PEN36C and a UR1C) . I would think you would get a diagram from the moderator if one fits your set. As for photos I havn't snapped the innards yet but I can if you think it would help in your set identification. regards Brian.

Brian4radio · 8th Sep 2008, 8:58 pm

hi Colin, I can obtain a VP1322 which is the same config. as the VP1321 except the base is a Mazda Octal type instead of a B7 base. I havn't found a source for the correct VP1321 valve yet. I would expect it may be quite hard to find a specimen as they were only used in a few sets anyway and it may cost more than the set is worth. Do you know of a "cheap" place I can try? Regards Brian.

PJL · 8th Sep 2008, 10:25 pm

Check the metallising is connected properly. Is the TC grid connection screened? Have you changed the caps?

Have you checked the sensitivity control? I am sure it can be made to work...Peter

Pete_kaye · 9th Sep 2008, 3:44 pm

Mine must be a 5013 then ,as it uses the same 4 valves mentioned.Some are equivalents though(U4020,C70D,VP13C,HL13C).Yes I would like to see photos.I had a thread last year on this topic.

Brian4radio · 9th Sep 2008, 8:16 pm

Hi Peter, the T/C is screened and two of the valves have intact metal screening but the PENDD 4020 is not screened and sits quite close to the heater volt dropper which gets quite warm.All the caps have been changed together with the metal rectifier, all three pots and quite a few resistors. These have all been changed to match the cct. diagram. The sensitivity control is set to about 200 ohms and the input voltage is held at 220 volts via variac to avoid the set going haywire. Regards Brian.

Brian4radio · 9th Sep 2008, 8:19 pm

Hi Pete, I have snapped the chassis of my Eveready 5008 set . If you send me an email I'll send you the photos . regards Brian

PJL · 10th Sep 2008, 7:34 pm

The added dimension is it may possibly never have worked after the valve change and I can't find specs for the VP13B. On the bright side it is just an IF amp...

Check the cathode volts of the VP13B with the sensitivity at max. My calculations say it should be around 1V. Check the voltages on the other valves too.

This set has a horrible arrrangement of switches to use the oscillator triode as a PU amp. Hvae you cleaned the switch properly?

Brian4radio · 10th Sep 2008, 9:11 pm

Hi Peter, I will test the cathode voltages on the valves. The switch is quite robust on this set but I have cleaned the fingers and tested for continuity as a precaution. I did test the VP13B on my valve tester as if it was a VP13A and it seemed to work OK.
My next move on this radio is to get a set of known good valves including a VP1321 and start again.
You may see a success story pop up in the posts one of these days if we are all lucky, watch this space. Thanks again for all your help with this set, kind regards Brian.

petervk2mlg · 10th Sep 2008, 11:39 pm

Specs for VP13B:
Vf:13V
If: 0.2A
Va: 200V
Ia 6mA
-Vg1:1V
Vg2:200V
Ig2:2mA
S:4mA/V
Ri:800Kohms

Different base from a VP13A
VP13B base pictured below

petervk2mlg · 11th Sep 2008, 12:04 am

It might be worth checking the IF alignment.
This set uses quite a low IF of 127 KHz.
Also what result do you get if you feed an audio signal into the volume control? Perhaps the audio distortion is comeing from the PEN/DD/4020

Peter

Brian4radio · 12th Sep 2008, 7:53 pm

Hi team,I have swapped the VP13B for a VP1322, leaving the anode and grid connections as I found them. The set is now working quite well. If I just substitute the PENDD4020 she works for a couple of minutes and then starts to fade so I've swapped both valves. thanks again for all your help and interest. Kind regards Brian.

5th Sep 2008, 2:47 pm	#1
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Ever Ready 5008 AC/DC Hi team, I am refurbing an Eveready 5008 AC/DC set circa 1935. The valve line up on the cct diagram is as follows TP2620, VP1321 and a PENDD 4020. Fitted in the set instead of the VP1321 is a VP13B, I can't find any info on the VP13B, is it a straight swap or are there a few component changes to make it work. At the moment I have garbled speach on strong stations and very poor sensitivity/selectivity on medium band. regards Brian.

5th Sep 2008, 3:13 pm	#2
petervk2mlg Heptode Join Date: Jan 2007 Location: Parkes, NSW Australia Posts: 877	Re: Eveready 5008 AC/DC My Brahns Vademecum indicates that while the 2 valves are similar, they have different bases. The VP1321 has an anode on the top cap, while the VP13B has the grid on top. Peter

5th Sep 2008, 10:53 pm	#3
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Eveready 5008 AC/DC Hi Peter, thanks for that info. I will have to check the wiring around the Vp1321 valve. I must say that the set is working after a fashion so the wiring must have been changed to suit the rogue valve in the past. I will investigate further. regards Brian.

8th Sep 2008, 9:30 am	#4
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Eveready 5008 AC/DC Hi Team, I have checked the wiring around the VP13B valve and sure enough as Peter suggested the anode connection and grid connection have been swapped over in the distant past. This leaves me with the original fault. The set only partially works, with only whistles on the medium band and garbled speech on the long wave(radio 4). I have not disturbed the I/F stages, should I alter any of the component values around the VP13B valve to make it more compatable. Regards Brian.

8th Sep 2008, 7:45 pm	#5
Pete_kaye Octode Join Date: Jun 2005 Location: Sheffield, South Yorkshire, UK. Posts: 1,227	Re: Eveready 5008 AC/DC Any chance of some photos? I have an Ever Ready mains set from about 1936.It is 'trf' ac/dc and uses some of the same valves as yours.I have never been able to find a circuit for it.There is a Superhet in a similar wooden case ,known as the 5010-what is yours?

8th Sep 2008, 8:15 pm	#6
ukcol Rest in Peace Join Date: May 2003 Location: Harlaxton, Lincolnshire, UK. Posts: 3,944	Re: Eveready 5008 AC/DC Hi Peter, Just a thought - If the valve substitution was an unofficial modification, the change in layout may have made the set prone to instabilty. It may be worth trying to get a VP1321 and putting the set back to its original state.

8th Sep 2008, 8:50 pm	#7
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Eveready 5008 AC/DC Hi Pete, I think Eveready only made a few AC/DC prewar sets i.e. 5008, 5013 (VP13C, HL13C, PEN36Cand a UR1C), 5017 (SIMILAR LINE UP)and a 5221(TH30C, VP13C, 2D13C, PEN36C and a UR1C) . I would think you would get a diagram from the moderator if one fits your set. As for photos I havn't snapped the innards yet but I can if you think it would help in your set identification. regards Brian.

8th Sep 2008, 8:58 pm	#8
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Eveready 5008 AC/DC hi Colin, I can obtain a VP1322 which is the same config. as the VP1321 except the base is a Mazda Octal type instead of a B7 base. I havn't found a source for the correct VP1321 valve yet. I would expect it may be quite hard to find a specimen as they were only used in a few sets anyway and it may cost more than the set is worth. Do you know of a "cheap" place I can try? Regards Brian.

8th Sep 2008, 10:25 pm	#9
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Ever Ready 5008 AC/DC Check the metallising is connected properly. Is the TC grid connection screened? Have you changed the caps? Have you checked the sensitivity control? I am sure it can be made to work...Peter

9th Sep 2008, 3:44 pm	#10
Pete_kaye Octode Join Date: Jun 2005 Location: Sheffield, South Yorkshire, UK. Posts: 1,227	Re: Ever Ready 5008 AC/DC Mine must be a 5013 then ,as it uses the same 4 valves mentioned.Some are equivalents though(U4020,C70D,VP13C,HL13C).Yes I would like to see photos.I had a thread last year on this topic.

9th Sep 2008, 8:16 pm	#11
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Ever Ready 5008 AC/DC Hi Peter, the T/C is screened and two of the valves have intact metal screening but the PENDD 4020 is not screened and sits quite close to the heater volt dropper which gets quite warm.All the caps have been changed together with the metal rectifier, all three pots and quite a few resistors. These have all been changed to match the cct. diagram. The sensitivity control is set to about 200 ohms and the input voltage is held at 220 volts via variac to avoid the set going haywire. Regards Brian.

9th Sep 2008, 8:19 pm	#12
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Ever Ready 5008 AC/DC Hi Pete, I have snapped the chassis of my Eveready 5008 set . If you send me an email I'll send you the photos . regards Brian

10th Sep 2008, 7:34 pm	#13
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Ever Ready 5008 AC/DC The added dimension is it may possibly never have worked after the valve change and I can't find specs for the VP13B. On the bright side it is just an IF amp... Check the cathode volts of the VP13B with the sensitivity at max. My calculations say it should be around 1V. Check the voltages on the other valves too. This set has a horrible arrrangement of switches to use the oscillator triode as a PU amp. Hvae you cleaned the switch properly?

10th Sep 2008, 9:11 pm	#14
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Ever Ready 5008 AC/DC Hi Peter, I will test the cathode voltages on the valves. The switch is quite robust on this set but I have cleaned the fingers and tested for continuity as a precaution. I did test the VP13B on my valve tester as if it was a VP13A and it seemed to work OK. My next move on this radio is to get a set of known good valves including a VP1321 and start again. You may see a success story pop up in the posts one of these days if we are all lucky, watch this space. Thanks again for all your help with this set, kind regards Brian.

10th Sep 2008, 11:39 pm	#15
petervk2mlg Heptode Join Date: Jan 2007 Location: Parkes, NSW Australia Posts: 877	Re: Ever Ready 5008 AC/DC Specs for VP13B: Vf:13V If: 0.2A Va: 200V Ia 6mA -Vg1:1V Vg2:200V Ig2:2mA S:4mA/V Ri:800Kohms Different base from a VP13A VP13B base pictured below Attached Thumbnails

11th Sep 2008, 12:04 am	#16
petervk2mlg Heptode Join Date: Jan 2007 Location: Parkes, NSW Australia Posts: 877	Re: Ever Ready 5008 AC/DC It might be worth checking the IF alignment. This set uses quite a low IF of 127 KHz. Also what result do you get if you feed an audio signal into the volume control? Perhaps the audio distortion is comeing from the PEN/DD/4020 Peter

12th Sep 2008, 7:53 pm	#17
Brian4radio Pentode Join Date: Aug 2005 Location: North Warwickshire, UK. Posts: 108	Re: Ever Ready 5008 AC/DC Hi team,I have swapped the VP13B for a VP1322, leaving the anode and grid connections as I found them. The set is now working quite well. If I just substitute the PENDD4020 she works for a couple of minutes and then starts to fade so I've swapped both valves. thanks again for all your help and interest. Kind regards Brian.