1978 sanyo receiver=weird bulbs

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cfz2882

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Got a nice sanyo receiver a couple weeks ago and getting around to checking it out-jcx2400kr made in 1978,suprizingly this is a few steps above that company's usuall dept.store grade stuff-looks comparable to pioneer,onkyo,kenwood etc.-big transformer,lots of power etc.Anyway all the dial bulbs are burnt out-they are about 1"long,1/4" dia,have wire leads in each end and run on 6v-i think these are known as "festoon"bulbs-anyone know of a source for these?i might have to adapt some standard bulbs if the original type is NLA.
 
I have seen similar bulbs in Harrison audio -studio mixer console meter bridges.Contact Allied,or Newark electronic supply-they probably have such bulbs.One of our transmitters here has such bulbs in the status lights on the transmitter-one light shows transmitter is on air,the other indicates a fault.We found LED replacements.Same sort of clip in bulb like a Buss miniature fuse.
 
Panel Bulbs

I remember these being used in various makes of hi-fi from the 70s, RS components can supply a 5/8volt version.

There is a guy in the states called Vintage hi-fi spares he supplies 6/8/12v fuse type bulbs for hifi receivers, though you wuyld have to solder wires onto the end of them to use them.

THe LED replacement ones that are coming out now seem a good idea, some manufacturers would run these bulbs a tad under there rated voltage, 5.8/7.9/11.8 volts and they are still going strong in a lot of equipment

http://uk.rs-online.com/web/p/filament-indicator-lamps/0105196/
 
Try Parts Express

I think the lamps you need are the ones on the link from Parts Express. You may need to solder leads to the ends of the "3AG Fuse" style body but that will work fine. $1.25 each and you can buy some spares. They have other voltages also if 6v isn't what you need.

If you are thinking about doing an LED retrofit check out

http://www.superbrightleds.com/

They have LED replacements for MANY common lamps including a full automotive cross reference database. I bet a lot of appliance panel lamp LED replacements could be found here.

Those LED's Festoon lamps on Ebay up thread are insanely overpriced...

A lot of the vintage receivers I have worked on I will just use discrete LED's and create a new lighting arrangement. Sometimes one can alter placement/use more LED's etc to get more uniform lighting. I think I first did this in the early 80's when I wanted to install a Yamaha receiver in my darkroom. The red LED's I used didn't fog the photo paper!

Let me know if you need any additional help. Are you planning on replacing any of the capacitors in the unit? At 35 years the electrolytic capacitors are living on borrowed time at this point.

Phil

http://www.parts-express.com/pe/showdetl.cfm?partnumber=070-118
kb0nes++2-26-2013-09-55-32.jpg
 
Re-capping

oh yes i am fanatical re-capper, there have been some sonic improvements doing this plus the peace of mind that replacing old electrolytics gives.

If i am doing audio circuitry i use Elna Silmics and polypropelenes if i have room in the pre-amp stages, for general re-capping i use Panasonics FC series

Can be expensive past time though :-)
 
Re-capping

At 30 plus years the ESR of the filter capacitors is likely climbed to the point where you might well hear a difference by replacing them. Also having had the displeasure of cleaning the inside of a component after capacitors have "vented" its easier to replace.

I tend to also replace electrolytic with film capacitors where I can fit them in. Luckily for me, my mindset allows me to not believe that audio grade capacitors sound "better" so I get to save a lot of money. Same applies to cables and other demon tweaks. Power conditioners are the new audio/video ripoff of the day!!

Of course the listening experience does involve the brain so its impossible to remove preconceived modifiers and expectations of sound. I suppose all is fair game, so if waxing your amplifier makes you enjoy music more, then wax away. I do have trouble with un-scrupulous manufacturers selling $12,000 speaker cables to people that don't know better though!
 
retrofit

those LED fuse lamps do look good-in the sanyo the lights run on AC,i might try a white LED in one bulb position and see how it looks:the original bulbs fit into oval openings in a thick acrylic light guide to light the dial scale "billboard style"from above-directional light from LEDs might not work as well with the light guide.Incandescent fuse lamps would work fine,was saving my salvaged ones for my '75 zenith"allegro" but since the fuse lamps are still avalible may use them on the sanyo.I usually use sprague capacitors when i need to replace a capacitor in vintage US equipment,philips caps in euro gear.Thanks for all the info guys,i'll see how this sanyo sounds once i hook some decent speakers to it-rated 50w/ch.BTW
 
Recaps

Works well in the modulator stages and modulator blocker caps,too!I recapped an older AM transmitter(part of a project to remove PCB caps-old broadcast gear was loaded with them)I got calls from the program director and manager about how much cleaner,clearer,and louder the AM sounded!So it works for broadcast and pro audio gear besides Hi-Fi-can pep up old "G" fiddle amps,too.I abandoned "Hi-Fi",too-because of all the "audiophool" BS going on now.Another funny thing-cable supports for your speaker and interconnects-now we can't have those $10,000 speaker and interconnects lying on a dirty floor,can we?Now I am expecting the audiophool companies to suggest you erect utility poles,crossarms,to put your cables on.One of these outfits even sold pole insulators to put cables on.If you get freindly with your electric co,you might be able to get some free!I have a catalog from a company-out at work we call them "The Maple Block People"they make small poles that look like miniature HV powerline pylons-you could use these on your model RR setup!They show them in their catalog holding speaker cables.What next?? Oh yes,recapped an old "Volumax" unit(audio processor for radio station transmitters)and it sounded like new!the unit was over 20yrs old.The client was happy-they liked their old CBS Labs Volumax!
 

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