[TechAssist] Re: HOT subs in general question
- From: Bil Green <tv.vcrrepair@xxxxxxxxxxx>
- To: Damon <techassist@xxxxxxxxxxxxx>
- Date: Sun, 3 Aug 2003 14:28:30 -0700
Hi Damon,
HOTs which have a higher amp rating contain a larger silicon chip.
Therefor the capacitance is higher. I guarantee that using a higher
amp HOT will often cause it to overheat. With some circuits this
does not happen. Don't know why.
Lower amp (than the original) HOTs tend to run at a normal temp.
(from my experience anyway). So, in a pinch you could use a D1879
(6A) if you didn't have a D1880 (8) on hand. The D1881 (10A) may
overheat.
--
Best regards,
Bil Green
2001 TV VCR
Mammoth Lakes, CA 93546
760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
Sunday, August 3, 2003, 6:54:23 AM, you wrote:
D> Ok, I'll keep the 1879's AND the 1881's......any rhyme or reasoning on the
D> 1881's getting hot??? Example: OK on Projos, bad on 25".......Ok on any
D> brand except this brand......
D> The 1881's are most likely not turning on hard enough to operate as a switch
D> under these circumstances.
D> Damon Brunger
D> Telrad Electronic Services
D> Ft Wayne, IN 46815
D> ----- Original Message -----
D> From: "Bil Green" <tv.vcrrepair@xxxxxxxxxxx>
D> To: "Damon" <techassist@xxxxxxxxxxxxx>
D> Sent: Friday, August 01, 2003 9:19 PM
D> Subject: [TechAssist] Re: HOT subs in general question
>> Haven't you noticed that using the D1881 when replacing a lower
>> amperage HOT causes it to overheat? It does happen, and too often
>> for me. That's why I stock several of the lower amp ones also.
>>
>> Same with the D1887 (no damper diode version). You guys do have
>> the right idea though - Generics are the way to go (except for
>> the counterfeits).
>>
>> --
>> Best regards,
>>
>> Bil Green
>> 2001 TV VCR
>> Mammoth Lakes, CA 93546
>> 760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
>>
>> Thursday, July 31, 2003, 5:55:46 AM, you wrote:
>>
>> D> Yeah, that's definitely one of them, if not the only one.....much more
>> D> power/current handling capability than the old 2SD1879, which was the
D> MOST
>> D> UNIVERSAL replacement beforehand.
>>
>> D> Now that I know the 2SD 1881 is the one to keep, I'll phase out the 2SD
>> D> 1879's.
>>
>> D> Damon Brunger
>> D> Telrad Electronic Services
>> D> Ft Wayne, IN 46815
>>
>> D> ----- Original Message -----
>> D> From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>> D> To: <techassist@xxxxxxxxxxxxx>
>> D> Sent: Wednesday, July 30, 2003 12:30 PM
>> D> Subject: [TechAssist] HOT subs in general question
>>
>>
>> >> A tech friend says if he cannot get, or ID an HOT he will sub a
>> >> 2SD1881. Says thiis 1881 seems to be a general heavy transistor for at
>> >> least test/estimate purposes.
>> >> Yesterday he had a Sharp with bad HOT 2SD2586.No subs avail. OEM a week
>> >> away.
>> >> Used an 1881 and ran cool.
>> >> I want to improve my TV HOT selection bin. Is there a certain selection
>> >> that are "must haves"?
>> >> Phil Bader
>> >> --
>> >> Philip Bader
>> >> Jan Phyl TV Inc. (estab. 1976)
>> >> 3420 Recker Hwy. Winter Haven, Fl. 33880
>> >> Fax (863) 299-8821
>> >> email: tjanphyl@xxxxxxxxxxxxxxx
>> >>
>> >>
>> D>
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