Strand lamp base P 28 for Patt 23/123/223 etc.

Mon, 23 Feb 2009, 10:40 pm

David Ashton16 posts in thread

I have just ordered a batch of direct replacement lamp bases to suit the Patt 23/123/ 223/45/264 Strand lights and they will cost under $20 each and this will make it economical to repair these older lights as currently a similar base costs $80 and then you have to re-drill holes to make it fit.Anyone who may be able to use these please contact me.

Thread (16 posts)

Threaded Flat

David AshtonMon, 23 Feb 2009, 10:40 pm

Marcus CookSat, 7 Mar 2009, 02:23 pm

Pattern 23 Parts

Hi David, I may be interested. I'm in the process of refurbishing several P23's (in my spare time, so its a slow process), and I may find one or two that will need a lamp base. What most of them have missing is the focusing lens fitting. Do you know where I might find some, preferably second hand. I also need gel frames for these, and other older lanterns. I'm in Adelaide, but would be prepared to consider postage from other states.

David AshtonSat, 7 Mar 2009, 06:42 pm

patt 23

If you can be precise about which focusing bit you want I do have parts, little reminder to all renovators of lights, you must use silicon heatproof cable, I see many lights with pvc cable, it melts and burns and is dangerous.

wesWed, 11 Mar 2009, 10:10 am

Hi David We still have many

Hi David We still have many Patt 23's and 123's in service some of which have broken lamp bases. Are these replacement lamp bases a P28s or a bipin type? Unfortunately someone replaced the leads in many of our Patt 23's with PVC 2C+E and then put 1000W lamps in them to boot, fortunately they have generally shorted out and tripped the dimmer rack before catching fire. Cheers Wes

karlaeWed, 11 Mar 2009, 01:52 pm

Hi david, just a reminder

Hi david, just a reminder reply that I'm up for the replacement lamp bases. Need 4 of them for 4 x Patt123s. Also looking for a couple of replacement gel frame rails for the same lamp. Please private message me a quote. Let me know if you want me to organise the freight/postage, otherwise Im happy for you to do it! Cheers, Karla

David AshtonWed, 11 Mar 2009, 07:45 pm

the prototype

the prototype is on its way for approval, so given no problems they are about 3 weeks away. They are a prefocus base exactly the same as the old ones but white not grey. On the subject of colour runners for 123's and 23's I have sent off some samples to a die caster to get a quote on making some.I will keep you informed.

karlaeThu, 12 Mar 2009, 09:39 am

Ok... bit confused now.

"They are a prefocus base exactly the same as the old ones but white not grey."

sorry can I just clarify that these new lamp bases are to suit T-based type lamps thus replacing the big old P-based lamps? Im wanting to upgrade my Pat123s to take T27/modern 500w lamps.

Ive looked at other replacement/upgrades for the Pattern range from a company called Limeburner in NZ wanting to charge $80 for a basic "C-block" shaped base mount.

David AshtonThu, 12 Mar 2009, 01:58 pm

bases

Changing to gy 9.5 bases is just that, a change, it is not an upgrade it is a downgrade because the gy 9.5 burn out at a far, far faster rate than p28 bases, some of which last 40 years.A T17 lamp gives you the same light quality and in practice, longer life because of heat problems with gy9.5's.This is why the US uses P28's on new fresnels even today,[including Selecon], it's just the high cost and having to re-drill for them which makes them impractical.Hence me getting some lower cost ones made.

karlaeThu, 12 Mar 2009, 03:38 pm

Right-o.. its just easier

Right-o.. its just easier for me to buy the T lamps though which I why I'd want to change to them. In my eyes an upgrade. Im not entirely clear on your terminology. GY 9.5 bases - The lamp bases used for T- based lamps and those GLB things? Im also confused about :

"the gy 9.5 burn out at a far, far faster rate than p28 bases...A T17 lamp gives you the same light quality and in practice, longer life because of heat problems with gy9.5's"

Wouldn't a T17 have a shorter life with the heat problems mentioned as opposed to a P28 base?

So sorry for the misunderstanding. I won't be needing any new P28 bases, but I have 4 of those that are in good condition that I am happy to either sell or swap to you.

Marcus CookThu, 12 Mar 2009, 07:48 pm

P28 Lamp Base

karlee, the T17 lamp fits the P28S lamp base. The change-over bases from Limeburner are to fit any lamp that can be plugged into a GY9.5 base. I have no trouble with supply of P28S lamps, in fact I purchased 10 500W lamps for my PAT23s yesterday (all of my supplier's current stock). The lamp bases David is offering will be direct replacements for the P28S base, and not the bipin base that you have in mind. If you are having problems sourcing the lamps for PAT23s (240V 500W P28S, Philips 6800C T/17), private message me, and I can order some for you.

David AshtonThu, 12 Mar 2009, 10:37 pm

you nailed it

you nailed it with your comment that you have 4 p28 bases in good condition, the "old" p28 base will last 30-40 years, but I change out gy 9.5 bases after 3-4 years.They are all T [theatre] class lamps both the t18 and t27 with 2 pins,[ by the way running 650 lamps in your lights also reduces the base life],and the t17 and others which use the p28, round prefocus, base.It's like swapping an old Rolls Royce for a new Hyundai, it may be nice now but in ten years which will be on the scrap heap.Marcus got it dead right.

David AshtonSat, 18 Apr 2009, 12:16 am

lamp life

A couple more factors in the cost benefit of P28 lamps, the T17, P 28 lamp is a 750 hour life lamp,the T18 Gy 9.5 lamp is a 300 hour life lamp, so the "new"T18 is 10% cheaper and 10% brighter but only has 40% of the life.And you will have to change lamp bases far more often.

karlaeTue, 21 Apr 2009, 10:46 am

Thanks for the info. Much

Thanks for the info. Much appreciated. I have been using my tunnel vision again when it comes to lamps and efficency. I'll stick to the P28 round prefocus lamps and the holders that I already have. I actually have the lamps already, will just need to reorder when they die. Thanks all!

Peter ProbertThu, 7 May 2009, 06:03 am

Interested in refurbishing Patt 23's

Hi I have just acuired 15 off Patt 23's which I am going to use shortly. They may be old but they are great lantern. I have printed out all the above to read at my leisure. I need to relamp all but then interested in this conversion. You can find me at Guys n' Dolls Musical Review WWW site via Christine. Peter

David AshtonThu, 7 May 2009, 08:02 pm

replacement bases

The new replacement bases have some features that improve on the older bases, like the centre contact can be unscrewed and cleaned or polished and the spring, which is the bit that usually fails, can be replaced.The bases have been modernized to take crimp connectors and the BA[British Association]screws changed to Metric which is much easier to source. Given that the T17 lamp costs 10% more but lasts 250% longer, it is a very false economy to change to the gy 9.5 bases. After 3 prototypes and adjustments they should be here next week.

Peter ProbertSat, 16 May 2009, 10:51 pm

Any more news on the arrival of the above.........

These bases with longer life lamps sound interesting - more details please Ol Mate...........price, source, availability et al peterp(at)a1(dot)com(dot)au

← Back to Tech Talk