Caps under Coil shields on Philharmonic? - EH Scott Radio Enthusiasts2024-03-29T11:48:05Zhttps://ehscott.ning.com/forum/topics/caps-under-coil-shields-on-philharmonic?commentId=3925821%3AComment%3A128693&xg_source=activity&feed=yes&xn_auth=noThe higher value domino type…tag:ehscott.ning.com,2022-09-25:3925821:Comment:1286982022-09-25T18:33:19.666ZNorman S Braithwaitehttps://ehscott.ning.com/profile/NormanSBraithwaite
<p>The higher value domino type capacitors in the Metropolitan 16A expander circuit are really wax paper capacitors, at least in the Metropolitan 16A set that I restored.</p>
<p>Norman</p>
<p>The higher value domino type capacitors in the Metropolitan 16A expander circuit are really wax paper capacitors, at least in the Metropolitan 16A set that I restored.</p>
<p>Norman</p> The other mica caps that I te…tag:ehscott.ning.com,2022-09-25:3925821:Comment:1286942022-09-25T15:05:01.040ZDavid Zrouthttps://ehscott.ning.com/profile/DavidZrout
<p>The other mica caps that I tested in the set were measuring low. 6200pf caps measuring 5200-5800pf<br></br> <br></br> <cite>Scott Seickel said:</cite></p>
<blockquote cite="https://ehscott.ning.com/forum/topics/caps-under-coil-shields-on-philharmonic#3925821Comment128561"><div><div class="xg_user_generated"><p>When you say the mica caps were out of spec, were they just measuring low? Did you test for leakage? Just curious as I don't find too many that are out, but leakage in these is becoming more…</p>
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<p>The other mica caps that I tested in the set were measuring low. 6200pf caps measuring 5200-5800pf<br/> <br/> <cite>Scott Seickel said:</cite></p>
<blockquote cite="https://ehscott.ning.com/forum/topics/caps-under-coil-shields-on-philharmonic#3925821Comment128561"><div><div class="xg_user_generated"><p>When you say the mica caps were out of spec, were they just measuring low? Did you test for leakage? Just curious as I don't find too many that are out, but leakage in these is becoming more common as the silver migrates. </p>
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</blockquote> Haven’t tested the caps yet,…tag:ehscott.ning.com,2022-09-25:3925821:Comment:1286932022-09-25T15:03:43.750ZDavid Zrouthttps://ehscott.ning.com/profile/DavidZrout
<p>Haven’t tested the caps yet, the resistors are out of spec. 47k measures 58k, 56ohm measuring 67ohms. <br></br> <br></br> <cite>Scott Seickel said:</cite></p>
<blockquote cite="https://ehscott.ning.com/forum/topics/caps-under-coil-shields-on-philharmonic#3925821Comment128561"><div><div class="xg_user_generated"><p>When you say the mica caps were out of spec, were they just measuring low? Did you test for leakage? Just curious as I don't find too many that are out, but leakage in these is becoming…</p>
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<p>Haven’t tested the caps yet, the resistors are out of spec. 47k measures 58k, 56ohm measuring 67ohms. <br/> <br/> <cite>Scott Seickel said:</cite></p>
<blockquote cite="https://ehscott.ning.com/forum/topics/caps-under-coil-shields-on-philharmonic#3925821Comment128561"><div><div class="xg_user_generated"><p>When you say the mica caps were out of spec, were they just measuring low? Did you test for leakage? Just curious as I don't find too many that are out, but leakage in these is becoming more common as the silver migrates. </p>
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</blockquote> When you say the mica caps we…tag:ehscott.ning.com,2022-09-25:3925821:Comment:1285612022-09-25T14:59:13.103ZScott Seickelhttps://ehscott.ning.com/profile/ScottSeickel
<p>When you say the mica caps were out of spec, were they just measuring low? Did you test for leakage? Just curious as I don't find too many that are out, but leakage in these is becoming more common as the silver migrates. </p>
<p>When you say the mica caps were out of spec, were they just measuring low? Did you test for leakage? Just curious as I don't find too many that are out, but leakage in these is becoming more common as the silver migrates. </p> I did pull one of them, the f…tag:ehscott.ning.com,2022-09-25:3925821:Comment:1286442022-09-25T14:53:06.046ZDavid Zrouthttps://ehscott.ning.com/profile/DavidZrout
<p>I did pull one of them, the first one wasn’t so bad. Both resistors under it were 20% out of spec, both caps were Mica. </p>
<p>other Mica caps in this set were out of spec but haven’t pulled these to check them. <br></br> <br></br> <cite>Kent King said:</cite></p>
<blockquote cite="https://ehscott.ning.com/forum/topics/caps-under-coil-shields-on-philharmonic#3925821Comment128776"><div><div class="xg_user_generated"><p>The 16A is MUCH newer and generally you won't have any components inside those…</p>
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<p>I did pull one of them, the first one wasn’t so bad. Both resistors under it were 20% out of spec, both caps were Mica. </p>
<p>other Mica caps in this set were out of spec but haven’t pulled these to check them. <br/> <br/> <cite>Kent King said:</cite></p>
<blockquote cite="https://ehscott.ning.com/forum/topics/caps-under-coil-shields-on-philharmonic#3925821Comment128776"><div><div class="xg_user_generated"><p>The 16A is MUCH newer and generally you won't have any components inside those smaller units to worry about - generally they are just adjustable coils, which can be trimmed without removing the covers (which is hard on that set). So...don't worry about those for the 16A.</p>
<p>Kent</p>
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</blockquote> The 16A is MUCH newer and gen…tag:ehscott.ning.com,2022-09-25:3925821:Comment:1287762022-09-25T11:25:01.868ZKent Kinghttps://ehscott.ning.com/profile/KentKing
<p>The 16A is MUCH newer and generally you won't have any components inside those smaller units to worry about - generally they are just adjustable coils, which can be trimmed without removing the covers (which is hard on that set). So...don't worry about those for the 16A.</p>
<p>Kent</p>
<p>The 16A is MUCH newer and generally you won't have any components inside those smaller units to worry about - generally they are just adjustable coils, which can be trimmed without removing the covers (which is hard on that set). So...don't worry about those for the 16A.</p>
<p>Kent</p> My FM and AM are inoperable o…tag:ehscott.ning.com,2022-09-25:3925821:Comment:1286402022-09-25T03:36:51.858ZDavid Zrouthttps://ehscott.ning.com/profile/DavidZrout
My FM and AM are inoperable on my 16A. I am just working my way through the FM signal path and most of the 6200pf mica capacitors are out of spec. But I ran into this also, should I take the covers off and replace the caps inside? Will they cause the radio to not pull in any stations? How do you remove the covers?
My FM and AM are inoperable on my 16A. I am just working my way through the FM signal path and most of the 6200pf mica capacitors are out of spec. But I ran into this also, should I take the covers off and replace the caps inside? Will they cause the radio to not pull in any stations? How do you remove the covers? The few Scotts that I've had…tag:ehscott.ning.com,2022-09-16:3925821:Comment:1286192022-09-16T16:24:41.177ZAlex R. Whitakerhttps://ehscott.ning.com/profile/AlexRWhitaker
<p>The few Scotts that I've had apart (AW-12 two and 1 dial, AW-15, AW-23, and the Philharmonic) all have components (i.e. resistors and paper capacitors) under the coil shields. As Kent said, you need to remove the shields anyway, to clean the contacts at the bottom to make sure they're making contact with chassis ground, and to inspect things. Come to think of it, the only one, that I know of, that doesn't have components under the shields is the 800B, which is about 10 years newer than…</p>
<p>The few Scotts that I've had apart (AW-12 two and 1 dial, AW-15, AW-23, and the Philharmonic) all have components (i.e. resistors and paper capacitors) under the coil shields. As Kent said, you need to remove the shields anyway, to clean the contacts at the bottom to make sure they're making contact with chassis ground, and to inspect things. Come to think of it, the only one, that I know of, that doesn't have components under the shields is the 800B, which is about 10 years newer than your Masterpiece. </p> Some do, some don't...I usual…tag:ehscott.ning.com,2022-09-15:3925821:Comment:1272542022-09-15T01:34:47.278ZKent Kinghttps://ehscott.ning.com/profile/KentKing
<p>Some do, some don't...I usually remove the shields for cleaning anyway, then replace anything under them that needs replacing. I know that's not super helpful...</p>
<p>Kent</p>
<p>Some do, some don't...I usually remove the shields for cleaning anyway, then replace anything under them that needs replacing. I know that's not super helpful...</p>
<p>Kent</p>