[Heath] HO 10 scope question (Update)

[K5MLC (Mike)]

Thanks, Morris.  Actually, yes, I remember waiting on the CRT and the other tubes to warm up in the old B&W sets! LOL.  I'd forgotten about that experience. Age here is 57. Guess it is time to bring out the old tube testor and start checking all the tubes before I start ordering stuff.  Thanks again for the shock to the gray matter ~ reminding me about the "extended" wait time. :)  Mike 


From: Morris <mdilli at nnwifi.com>
>To: 'K5MLC (Mike)' <k5mlc at sbcglobal.net>
>Cc: w4gbw at bellsouth.net; cemilton at aol.com; heath at puck.nether.net
>Sent: Tuesday, July 12, 2011 5:28 PM
>Subject: RE: [Heath] HO 10 scope question (Update)
>
>
>You must be too young to remember waiting on the defective CRT on the old black and white TV to warm up so we could see a picture.   Sounds like the CRT is the problem with reduced emission or a cathode short.  There was available a special filament voltage booster that sometimes extended the life of the old CRT but it was marginal in value IIRC.
>
>
>Morris 
>-----Original Message-----
>>From: heath-bounces at puck.nether.net [mailto:heath-bounces at puck.nether.net] On Behalf Of K5MLC (Mike)
>>Sent: Tuesday, July 12, 2011 10:29 AM
>>To: cemilton at aol.com; w4gbw at bellsouth.net; heath at puck.nether.net
>>Subject: Re: [Heath] HO 10 scope question (Update)
>>
>>
>>Hello everyone,
>> 
>>Thanks for all the great ideas! Here is an update on the HO 10 scope project: I opened her up and gave her a good look over, looking for obvious burned stuff, loose stuff, etc. I unplugged the tubes and did a visual on those, and returned them to their sockets. I measured the caps and resistors and found nothing "way out," although several of the hv resistors are higher in value and are on the "replace" list. I found nothing obviously damaged, so I plugged her in and switched her on, again watching for anything unusual.  The tubes lit up. I waited, but no trace on the CRT.  I decided to let her remainon and "cook" a while ~ after 10-15 minutes - finally, here came a trace!  I have repeated this scenario several times, and I have even put her in the "loop" and monitored my signal FB.  
>> 
>>So, any ideas about what to replace to eliminate the "wait" time? All the tubes are reasonably priced except the 6C10!  That one is pricey! (On, and BTW, I do have the assembly manual and schematic.) 
>> 
>>Thanks for everyones assistance. 
>> 
>>Mike
>> 
>>Chuck, Hayseed has a recap kit listed for an HR 10, but not the HO 10.  But it looks like they would assemble one for me if I requested it. Thanks for the info. 
>>
>>
>>From: "cemilton at aol.com" <cemilton at aol.com>
>>>To: w4gbw at bellsouth.net; k5mlc at sbcglobal.net; heath at puck.nether.net
>>>Sent: Tuesday, July 5, 2011 6:56 PM
>>>Subject: Re: [Heath] HO 10 scope question
>>>
>>>
>>>Try   www.hayseedhamfest.com        They have a complete re-build kit for the scope.  
>>>
>>>73
>>>Chuck
>>>W4MIL
>>>
>>>
>>>Remember, the government cannot give anything to anyone that they have
>>>not first taken away from someone else.
>>>
>>>
>>>
>>>-----Original Message-----
>>>From: Charles W. Morehouse <w4gbw at bellsouth.net>
>>>To: K5MLC (Mike) <k5mlc at sbcglobal.net>; Heathkit <heath at puck.nether.net>
>>>Sent: Tue, Jul 5, 2011 7:44 pm
>>>Subject: Re: [Heath] HO 10 scope question
>>>
>>>
>>>Hi Mike,
>>>Yes, have restored a couple of them and others with the same circuit.  Replace the HIV caps and all the resistors in the HV circuit.
>>>The electrolytics are unobtanium, but I cut off the base with a Dremmel tool and install new caps inside.  Epoxy the can together.
>>>Works great and keeps the look original.  Suspect the 1V2.  Makes a great scope to monitor your stereo.  Good luck.
>>>Wayne,
>>>W4GBW
>>> 
>>> 
>>>"Madam, we have given you a republic, if you can keep it."  Ben Franklin
>>>
>>>
>>>
>>>
>>>----- Original Message ----- 
>>>>From: K5MLC (Mike) 
>>>>To: Heathkit 
>>>>Sent: Tuesday, July 05, 2011 4:14 PM
>>>>Subject: [Heath] HO 10 scope question
>>>>
>>>>
>>>>Hello,
>>>>
>>>>After sitting unused for a while, my HO10 monitor scope appears to be dead.  It was working FB before being shelved.  As far as I know, it has never been recapped.  Should I start there? Anyone have any other ideas/suggestions?? 
>>>>
>>>>Thanks in advance.
>>>>
>>>>Mike  K5MLC
>>>>_______________________________________________
>>>>Heath mailing list
>>>>Heath at puck.nether.net
>>>>https://puck.nether.net/mailman/listinfo/heath
>>>>
>>>_______________________________________________
Heath mailing list Heath at puck.nether.net https://puck.nether.net/mailman/listinfo/heath 
>>>
>>>
>
>
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