Re: [Drakelist] Filters
Crystals age and shift frequency, sometimes they quit all together. You can purchase new filters from Sherwood or INRAD. Buying used filters or crystals is risky. 73, Gary___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Filters
Maybe wear out isn't the best term. Crystals can drift (sometimes badly) and they can do that while just sitting dormant. It is also true that many of the older crystal filter designs paid scant attention to phase characteristics, basically just designing for best possible skirts. These filters were hard to listen to when they were new! In other words you may have filters in which some of the crystals have drifted or you may have filters that were always this way. Modern crystal filter design and DSP filters do pay attention to phase and depending upon type can be easier on the ears. We get used to the new stuff and maybe we don't like the old stuff as much as we remembered :-) Just a theory. Dennis AE6C On 1/2/12, John Schroeder dmir2...@yahoo.com wrote: Hello group: This may be a silly question but, do XTAL filters wear out? I bought a .5, and a 2.5 stock Drake filters for 100 bucks for the both of them... They ring so badly, they are useless... BTW, they are installed in a R4-C, if it makes a difference... Very 73 ... John ... ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [drakelist] Filters for non-ham use
Don - There's strength in numbers. Now I don't feel bad about having four! 73, Garey - K4OAH Atlanta Don and Diana Cunningham wrote: And I thought I was bad with ONLY three of them and a TR5, Gary, hi hi. 73, Don, WB5HAK - Original Message - From: Gary Poland [EMAIL PROTECTED] Here here..I like the TR-7 so much I have 4 of them...HI! Thanks for making them possible Mike! 73, Gary -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] Filters
About half of the repairs I do on Drake gear is removing somebody's modifications after which the radio works fine again... Marty - Original Message - From: Mike Elliott [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, May 03, 2004 10:05 AM Subject: [drakelist] Filters Thank you Stu - I designed those output filters for full coverage, and I resent the implication that they are faulty. Thanks again for your comments. Mike -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ -- --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.674 / Virus Database: 436 - Release Date: 5/3/04 -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] Filters
I've used TR7's for years, often on Navy Mars frequencies, and have yet to need to adjust any filters. Maybe that's why so many of them worked so well for embassy use??? 73, Don, WB5HAK - Original Message - From: Mike Elliott [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, May 03, 2004 1:05 PM Subject: [drakelist] Filters Thank you Stu - I designed those output filters for full coverage, and I resent the implication that they are faulty. Thanks again for your comments. Mike -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ -- -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] Filters for non-ham use
Here here..I like the TR-7 so much I have 4 of them...HI! Thanks for making them possible Mike! 73, Gary -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
