Bush TV22 - UK Vintage Radio Repair and Restoration Discussion Forum

Iontrap · 10th Jan 2022, 6:54 pm

Hello everybody
Yes I have pulled out my TV22 mainly in anticipation of The British Heritage television chaps. They are making great progress and and I am fortunate to perhaps be in range.
Anyway it still works but I think it needs a new PZ30.
On closer examination wires are cracking.
Any suggestions suppliers of silicon wires please?
Should have bought NVCF.
Simon

Freya · 10th Jan 2022, 6:59 pm

Found silicone sleeving to be better option as only one end needs to be disturbed, cut affected wire, crumble or slide off old rubber, then twist the multi strand conductor in your fingers to make solid. The silicone sleeve can be slid over the conductor. Re solder wire.

Why does it need a PZ30 ?

Iontrap · 11th Jan 2022, 7:10 am

Thank you Steve.
Hadn't considered that.
Certainly didn't want reels of wire I am not likely to use.

The sets gone a bit hummy. R28 a 38R got hot. I never had a new PZ30 to put in at the time.

Iontrap · 11th Jan 2022, 7:21 am

Thanks also to those who pointed me at forum member Phil Marrison.
Just the job.

Iontrap · 11th Jan 2022, 3:16 pm

For my fellow persons working on TV22.
I have now done the Red/Green wires on the dropper selection.
Also I received a new PZ30 today.
What a difference.
It was getting hummy. Volume at minimum.
Now it is silent with a NOS PZ30.
Simon

You youngsters out there. Can you spot honey moon pliers??

mark pirate · 11th Jan 2022, 3:38 pm

The PZ30 lives a hard life in the TV22, one half is the boost diode.
All three of my sets have been fitted with NOS PZ30's.
Fitting a new EY51 EHT rectifier is also a good idea.

Mark

Nickthedentist · 11th Jan 2022, 3:56 pm

Quote:

Originally Posted by Iontrap

You youngsters out there. Can you spot honey moon pliers??

Yes

Googling confirmed my suspicions!

Iontrap · 11th Jan 2022, 5:09 pm

Apparently they are called Rylans in the broadcast world.
No Don't snigger. I won't explain it on the forum.

Iontrap · 11th Jan 2022, 5:16 pm

Anyway if anyone restoring a Bush TV22 grab a PZ30 as opportunities arrive.

Iontrap · 13th Jan 2022, 10:14 pm

Alas some hum is back.
So I purchased from BVWS a 60/250U @ 350V
Wound a few turns of self-amalgamating tape so as to stuff it out and fit where the original cap lives.
Works a treat. I recommend if you don't want to restuff capacitors etc.

Heatercathodeshort · 14th Jan 2022, 10:46 am

Looks good. I must admit I was a bit doubtful that the PZ30 was causing hum .Rectifiers rarely do this unless one half of a full wave rectifier has failed. As Mark mentioned the PZ30 was often employed as a boost/damper + HT rectifier in a half wave circuit so this would not apply. They were once a big problem with the very early versions used in the Ekco TS88 and Bush TV12 but with Mullard mods turned into a very reliable valve. John.

Iontrap · 14th Jan 2022, 5:02 pm

Yes John.
It was wishful thinking. A new PZ30 seemed to help a tad. It was on its original.
The smoother electrolytic did the business.
Now ready to sell on. I am torn. I do not use the set and when gone the Aurora can go. Not a collector. No more 405. But it is working so well!
It has a CRM93 after the Mullard met with an unfortunate incident.
It is quite well restored. Perhaps not to Mr Ostlers or Dr Holdens standard but I think not bad.

Heatercathodeshort · 14th Jan 2022, 5:44 pm

Sorry to learn of your departure from 'proper' tv. You may 'be back' as they say. Regards, John.

Iontrap · 14th Jan 2022, 6:31 pm

Oh dear John
Feeling guilty now.
My wife reminds me she bought the TV22 from Dunsters antiques Staines.
I had a look first. "can I take the back off"? I asked.
The chap said why? It will never work again. Just wanted to make sure all parts present.
Paid £40
About 22 years ago.
Simon

Heatercathodeshort · 14th Jan 2022, 6:38 pm

22 years and a present from your wife....How could you?

.
Maybe sleep on it.. John.

HamishBoxer · 14th Jan 2022, 7:26 pm

Unless really need the cash, you will regret selling and a good runner.

agardiner · 14th Jan 2022, 7:30 pm

Quote:

Originally Posted by HamishBoxer

Unless really need the cash, you will regret selling and a good runner.

Indeed. The picture is lovely. You may never get another one like it and come to regret selling it on.

HamishBoxer · 14th Jan 2022, 7:59 pm

I once sold 2 Wireless Set 19,s, inc 1 that was working , with all accessories for both inc the baseboard , alone worth £350. The lot went for £100!

Todays value would be £2K plus, the one I have now cost me £400 without all the above.

Dont live to regret it, yes, I was skint at the time I admit.

Iontrap · 14th Jan 2022, 8:01 pm

Thank you
You are not wrong.
Moving on the HMV.

Iontrap · 15th Jan 2022, 5:23 pm

Thanks for the kick everybody.
Yes a general look around says you would not get a return on time and money spent on it. I am keeping the set.
It is working very well and so it will get used and I do await the heritage tv persons efforts.

Not sure what frequency they will be on. 45MHz but they are battling the military and Ofcom??
Simon

10th Jan 2022, 6:54 pm	#1
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Bush TV22 Hello everybody Yes I have pulled out my TV22 mainly in anticipation of The British Heritage television chaps. They are making great progress and and I am fortunate to perhaps be in range. Anyway it still works but I think it needs a new PZ30. On closer examination wires are cracking. Any suggestions suppliers of silicon wires please? Should have bought NVCF. Simon Attached Thumbnails

10th Jan 2022, 6:59 pm	#2
Freya Octode Join Date: Jan 2009 Location: Falmouth, Cornwall, UK. Posts: 1,989	Re: Bush TV22 Found silicone sleeving to be better option as only one end needs to be disturbed, cut affected wire, crumble or slide off old rubber, then twist the multi strand conductor in your fingers to make solid. The silicone sleeve can be slid over the conductor. Re solder wire. Why does it need a PZ30 ? __________________ Stephen _________"It`s only an old telly" ___

11th Jan 2022, 7:10 am	#3
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Thank you Steve. Hadn't considered that. Certainly didn't want reels of wire I am not likely to use. The sets gone a bit hummy. R28 a 38R got hot. I never had a new PZ30 to put in at the time.

11th Jan 2022, 7:21 am	#4
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Thanks also to those who pointed me at forum member Phil Marrison. Just the job.

11th Jan 2022, 3:16 pm	#5
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 For my fellow persons working on TV22. I have now done the Red/Green wires on the dropper selection. Also I received a new PZ30 today. What a difference. It was getting hummy. Volume at minimum. Now it is silent with a NOS PZ30. Simon You youngsters out there. Can you spot honey moon pliers?? Attached Thumbnails

11th Jan 2022, 3:38 pm	#6
mark pirate Dekatron Join Date: Mar 2008 Location: Worthing, West Sussex, UK Posts: 5,185	Re: Bush TV22 The PZ30 lives a hard life in the TV22, one half is the boost diode. All three of my sets have been fitted with NOS PZ30's. Fitting a new EY51 EHT rectifier is also a good idea. Mark

11th Jan 2022, 5:09 pm	#8
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Apparently they are called Rylans in the broadcast world. No Don't snigger. I won't explain it on the forum.

11th Jan 2022, 5:16 pm	#9
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Anyway if anyone restoring a Bush TV22 grab a PZ30 as opportunities arrive. Attached Thumbnails

13th Jan 2022, 10:14 pm	#10
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Alas some hum is back. So I purchased from BVWS a 60/250U @ 350V Wound a few turns of self-amalgamating tape so as to stuff it out and fit where the original cap lives. Works a treat. I recommend if you don't want to restuff capacitors etc. Attached Thumbnails

14th Jan 2022, 10:46 am	#11
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Bush TV22 Looks good. I must admit I was a bit doubtful that the PZ30 was causing hum .Rectifiers rarely do this unless one half of a full wave rectifier has failed. As Mark mentioned the PZ30 was often employed as a boost/damper + HT rectifier in a half wave circuit so this would not apply. They were once a big problem with the very early versions used in the Ekco TS88 and Bush TV12 but with Mullard mods turned into a very reliable valve. John.

14th Jan 2022, 5:02 pm	#12
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Yes John. It was wishful thinking. A new PZ30 seemed to help a tad. It was on its original. The smoother electrolytic did the business. Now ready to sell on. I am torn. I do not use the set and when gone the Aurora can go. Not a collector. No more 405. But it is working so well! It has a CRM93 after the Mullard met with an unfortunate incident. It is quite well restored. Perhaps not to Mr Ostlers or Dr Holdens standard but I think not bad.

14th Jan 2022, 5:44 pm	#13
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Bush TV22 Sorry to learn of your departure from 'proper' tv. You may 'be back' as they say. Regards, John.

14th Jan 2022, 6:31 pm	#14
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Oh dear John Feeling guilty now. My wife reminds me she bought the TV22 from Dunsters antiques Staines. I had a look first. "can I take the back off"? I asked. The chap said why? It will never work again. Just wanted to make sure all parts present. Paid £40 About 22 years ago. Simon

14th Jan 2022, 6:38 pm	#15
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Bush TV22 22 years and a present from your wife....How could you?. Maybe sleep on it.. John.

14th Jan 2022, 7:26 pm	#16
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: Bush TV22 Unless really need the cash, you will regret selling and a good runner. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

14th Jan 2022, 7:59 pm	#18
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: Bush TV22 I once sold 2 Wireless Set 19,s, inc 1 that was working , with all accessories for both inc the baseboard , alone worth £350. The lot went for £100! Todays value would be £2K plus, the one I have now cost me £400 without all the above. Dont live to regret it, yes, I was skint at the time I admit. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

14th Jan 2022, 8:01 pm	#19
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Thank you You are not wrong. Moving on the HMV. Attached Thumbnails

15th Jan 2022, 5:23 pm	#20
Iontrap Pentode Join Date: Jul 2020 Location: Staines, Surrey, UK. Posts: 130	Re: Bush TV22 Thanks for the kick everybody. Yes a general look around says you would not get a return on time and money spent on it. I am keeping the set. It is working very well and so it will get used and I do await the heritage tv persons efforts. Not sure what frequency they will be on. 45MHz but they are battling the military and Ofcom?? Simon