EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Troy Taylor
  • Male
  • Edmonds, WA
  • United States
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Troy Taylor's Friends

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  • Ronald Babb
  • Robert Feenstra
  • mike hadley
  • John Chidgey
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Troy Taylor's Discussions

Low voltage in Philharmonic power supply

Started this discussion. Last reply by David C. Poland Mar 11. 14 Replies

Hello-I am in the midst of restoring a pointer dial Philharmonic that I bought this past summer from a forum member.  It is in great condition and had had very little previous work done to it, so…Continue

AW12 DELUXE IN UNUSUAL TABLE TOP CABINET FOR SALE

Started this discussion. Last reply by Dave Jun 17, 2020. 3 Replies

These are pictures of a Scott AW12 Deluxe receiver that is believed to be the AVC version, owing to the presence of a Wunderlich tube in the third socket on the left side of the chassis.  The origin…Continue

Tauscher board restoration

Started this discussion. Last reply by Norman S Braithwaite Sep 17, 2019. 7 Replies

Hello- I recently obtained a 12" Tauscher board for my AW23 to replace the one that was listed as "discarded" in October 1948 on the paperwork that came with the radio.  Having never seen one before…Continue

Current production Russian and Chinese 2A3 tubes

Started this discussion. Last reply by Troy Taylor Jul 7, 2019. 6 Replies

Hello-My Scott AW23 uses a quad of 2A3 tubes in the audio output. Vintage American-made brand NOS replacement tubes are prohibitively expensive to purchase, so I am wondering if anyone has any…Continue

 

Troy Taylor's Page

Latest Activity

David C. Poland replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"I am thinking spot on voltage readings are not too critical, because the radio is designed to operate well over a range of of 100 to 130 volts AC, in conjunction with the hi-low switch, allowing a  15 volt range on the power transformer primary…"
Mar 11
Robert Feenstra replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Troy, on the negative voltage divider, I've had to play with the resistances to get the voltages close to spec.  If the -27 volts is high ( as you indicated: -23.7), it will affect the bias on the output tubes causing them to conduct a bit…"
Mar 11
Troy Taylor replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Hello- As I continue to listen to this wonderful old set, I have a new question.  How do verify that the output tubes in the amp are properly biased?  And, if they are not, how do I correct the problem?  I am presently using a matched…"
Mar 10
Troy Taylor replied to Lance Hughes's discussion SCOTT NAPIER ALLWAVE 12
"I should also mention that it does not require much moisture to help loosen the glue while ironing.  Just dip your finger in a bowl of water and trace along where you want to soften the glue before ironing.  If the water steams away before…"
Feb 24
Troy Taylor replied to Lance Hughes's discussion SCOTT NAPIER ALLWAVE 12
"Hello- Hide glue is used extensively in player piano restorations (another hobby of mine) so I have lots of experience using it.  If you need to remove something that is glued with hide glue, it will soften and let go with the application of…"
Feb 23
Troy Taylor replied to David C. Poland's discussion Philly BOL restoration problems
"Hello- I wrapped a wire around the 6J7 scratch-suppressor plate pin on my 1937 pointer-dial Philharmonic this morning and have a meter measuring the voltage right now.  It is holding steady at 220VDC.  A finger on the grid cap makes a very…"
Feb 13
mike hadley replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Hi Troy, If there was a problem with the power transformer you would know about it by now, if there is a shorted turn it's usually followed by smoke, dont't forget that the 6L6 tubes are running in class A and will be pulling a fair bit of…"
Feb 8
David C. Poland replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Troy - Would appreciate a voltage reading on the 6J7 plate (pin 3) -  front far left, 2nd back, Scratch Suppressor. See if it is somewhere 160 volts? "
Feb 7
Troy Taylor replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"I should also mention that the power transformer is running about 118F; noticeably warmer than either of the chokes, which are both lukewarm at best.  Set has been operating continuously for over 3 hours now. The 6L6 tubes test "OK",…"
Feb 7
Troy Taylor replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Hello- Thank you all for the suggestions and advice.  I went through the power supply/amp chassis again and checked everything.  The biggest problem I discovered was the 10H and 30H chokes were miswired opposite of the schematic.  So…"
Feb 7
Troy Taylor replied to Troy Taylor's discussion Just acquired first EH Scott radio, an Allwave 12, and have some questions.
"Hello-  It took longer than expected, but last evening I finally got a chance to investigate the power supply.  I could not find anything amiss with the filter caps or any other components.  So I replaced the faulty 80 with a known…"
Jan 20
David C. Poland replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Hi ,Troy, I powered up my pointer Philharmonic about 75 minutes ago. The power transformer is mildly warm to touch on top. Both amp's chokes are mildly warm. Nowhere near hot, just warm, no problem leaving a finger on either 10 seconds or…"
Jan 17
Karl Sherwin replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Thanks Mike, I had that info from this site, but didn't have the entire Riders Vol 14 info, now I do!"
Jan 17
mike hadley replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Karl Look at the top of this page, Scott info and archive, see Philharmonic folder, lots of information there"
Jan 17
Karl Sherwin replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Silly me, I found the Riders info on the Radio & Broadcast library..."
Jan 17
Karl Sherwin replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Troy, I agree with Mike's suggestions, especially the 6L6 bias. BTW, is that Riders available for download? I'll be working on my Philly soon and would like to have as much service info as possible."
Jan 17

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At 12:02pm on March 13, 2018, John De Wit said…

Hi Troy

Are you able to provide any leads to help me locate the 15" Philharmonic speaker?

Thanks

John

 
 
 

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