Philco 38-690 tweeter improvement

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Philco 38-690 tweeter improvement

wonderwrench
Member

Posts: 96
Threads: 16
Joined: Oct 2007

07-26-2008, 12:06 AM

Ron Ramirez Wrote:I doubt that there would be anything to worry about at 4 kc. I would be hesitant to drop it much below that, however. But, as with all internet "advice," remember, YMMV.

The Philco "tweeters" were six inch, paper cone, drivers with small voice coils and small field coils so, as you have pointed out, their frequency response would be rather limited anyway. Add the 10 kc filter in the radio itself, and there you go...the radio is not going to reproduce above 10 kc anyway.

Are you speaking of a whistle filter? circuit location?

Bill

It's not what you don't know that hurts you it's what you know that's not so.

Find

« Next Oldest | Next Newest »

Messages In This Thread

Philco 38-690 tweeter improvement - by Dave Slusarczyk - 07-25-2008, 09:33 AM

Re: Philco 38-690 tweeter improvement - by Syl - 07-25-2008, 11:16 AM

Re: Philco 38-690 tweeter improvement - by Dave Slusarczyk - 07-25-2008, 08:48 PM

Re: Philco 38-690 tweeter improvement - by Syl - 07-25-2008, 09:19 PM

[No subject] - by Ron Ramirez - 07-25-2008, 10:39 PM

[No subject] - by wonderwrench - 07-25-2008, 10:52 PM

[No subject] - by Ron Ramirez - 07-25-2008, 11:49 PM

[No subject] - by Dave Slusarczyk - 07-25-2008, 11:53 PM

[No subject] - by wonderwrench - 07-26-2008, 12:06 AM

[No subject] - by Ron Ramirez - 07-26-2008, 12:06 AM

[No subject] - by Ron Ramirez - 07-26-2008, 12:13 AM

[No subject] - by Dave Slusarczyk - 07-26-2008, 12:59 AM

[No subject] - by BDM - 07-26-2008, 01:40 AM

[No subject] - by wonderwrench - 07-26-2008, 01:48 AM

[No subject] - by wonderwrench - 07-26-2008, 02:30 AM

[No subject] - by Syl - 07-26-2008, 09:33 AM

[No subject] - by Ron Ramirez - 07-26-2008, 10:20 AM

[No subject] - by Syl - 07-26-2008, 12:52 PM

[No subject] - by Dave Slusarczyk - 07-26-2008, 04:33 PM

[No subject] - by wonderwrench - 07-26-2008, 04:47 PM

[No subject] - by wonderwrench - 07-26-2008, 04:53 PM

[No subject] - by Ron Ramirez - 07-26-2008, 05:40 PM

[No subject] - by Syl - 07-26-2008, 05:51 PM

[No subject] - by Syl - 07-26-2008, 05:55 PM

[No subject] - by Dave Slusarczyk - 07-26-2008, 06:50 PM

[No subject] - by Syl - 07-26-2008, 08:17 PM

[No subject] - by Dave Slusarczyk - 07-26-2008, 10:26 PM

[No subject] - by Syl - 07-27-2008, 12:11 AM

[No subject] - by Dave Slusarczyk - 07-27-2008, 02:02 PM

[No subject] - by Terry Judkins - 07-27-2008, 06:59 PM

[No subject] - by wonderwrench - 07-27-2008, 07:11 PM

[No subject] - by Dave Slusarczyk - 07-27-2008, 07:53 PM

[No subject] - by wonderwrench - 07-27-2008, 10:00 PM

[No subject] - by Syl - 07-28-2008, 11:21 AM

[No subject] - by Dave Slusarczyk - 07-28-2008, 06:10 PM

[No subject] - by BDM - 07-28-2008, 06:17 PM

[No subject] - by Ron Ramirez - 07-28-2008, 06:59 PM

[No subject] - by Dave Slusarczyk - 07-28-2008, 07:12 PM

[No subject] - by Syl - 07-28-2008, 09:33 PM

View a Printable Version

Users browsing this thread: 2 Guest(s)

Recent Posts
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
Hi Cap'n Clock, Unfortunately, I do not have this radio. This is a shame because this should be a good performer. 2A5...MrFixr55 — 06:48 AM
American Bosch Model 802 auto radio
I think it would come under either American Bosch or United American Bosch. American Bosch made sets for the American We...Arran — 05:53 AM
trying to identify this wire type
Thanks to all for the feedback. As Arran said, it is probably an older replacement and yes it has a grid cap so I will ...georgetownjohn — 09:32 PM
trying to identify this wire type
It's possible that the red wire, actually a grid cap lead, is a very old replacement, I can't remember seeing a pre 1939...Arran — 09:18 PM
Gilfillan Brothers Car Radio?
Hi everyone, Special thanks to Joe Rossi for tracking down this obscure radio and thanks to others who took up the hun...Antipodal — 08:15 PM
trying to identify this wire type
Here's one source for your wire of many. Take care and BE HEALTHY! Gary P.S. Can't get the right color you need? I ...GarySP — 06:40 PM
trying to identify this wire type
...and modern wire of the appropriate gauges and insulation V-rating (300V minimum, usually shown right on the wire) is ...morzh — 05:47 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
I have a question about this radio, is there anyone that has access to this radio that has an intact unmolested speaker ...captainclock1988 — 04:28 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
Well what makes me confuse all of those companies is that all three of those companies (Setchell-Carlson, Stromberg-Carl...captainclock1988 — 04:21 PM
trying to identify this wire type
The red wire is rubber covered wire. The others are cotton braid over rubber often in colors or a tracer, also strand...Chas — 02:43 PM

Who's Online

There are currently 7043 online users. [Complete List]
» 2 Member(s) | 7041 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me