"K4GM-George" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Just buy and install the AC-4R sold by WB8VGE. It replaces all parts with solid state parts and bigger and better caps and resistors. I have one and it works great! It takes about two hours to do the job the first time.
http://www.theheathkitshop.com/drakeac4rreplace.html 73, George K4GM -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bollini, Maurizio Sent: Tuesday, June 07, 2005 5:11 AM To: drakelist@www.zerobeat.net Subject: [drakelist] A question on restoring and improving an AC-4 "Bollini, Maurizio" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Good morning to all, I have two AC-4 in original conditions, in working order. I'd like to restore these units before continue to use them as well make a log of intervention (I plan to do this on all my Drake radios, I think it is useful for me and could give added value in case they will be selled. Lack of maintenance log is really a miss for me). Back to my object, please find the following questions. I have in mind not only to replace parts but also to improve the reliability, if possible. 1) Which are the best replacement for rectification diode? In origin they are B5G5. a) could I use 1N4007 or BY255 ? b) is there a better (I mean "more robust") replacement ? To be in the safest side possible. c) for those in the HT section, which are in series, is there a need to put a resistor in parallel ? Reason? Which value/power ? 2) Resistors a) does it make sense to replace them same value increasing the power rating? b) R3=100 Ohm on the 250V section i) does it make sense to replace this with a coil of proper value to improve filtering? 3) Capacitors a) does it make sense to increase the capacity to improve filtering (not so much to avoid an high peak current at sturtup and make a disaster...) Sorry if my questions are so basic and maybe already covered more than once before. I'll read with interest your worthy comments and experiences. 73 Maurizio, IZ2CED ____________________________________________________________________________ _____________________________________ Questo messaggio e da intendersi esclusivamente ad uso del destinatario e puo contenere informazioni che sono di natura privilegiata, confidenziale o non divulgabile secondo le leggi vigenti. Se il lettore del presente messaggio non e il destinatario designato, o il dipendente/agente responsabile per la consegna del messaggio al destinatario designato, si informa che ogni disseminazione, distribuzione o copiatura di questa comunicazione e strettamente proibita anche ai sensi del decreto legislativo 196/03 . Se avete ricevuto questo messaggio per errore, vi preghiamo di notificarcelo immediatamente a mezzo e-mail di risposta e successivamente di procedere alla cancellazione di questa e-mail e relativi allegati dal vostro sistema. ____________________________________________________________________________ _____________________________________ This message is intended only for the use of the addressee and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this e-mail in error, please notify us immediately by return e-mail and delete this e-mail and all attachments from your system. ____________________________________________________________________________ _____________________________________ ---------------------------------------------------------------------- On Behalf of "Bollini, Maurizio" <[EMAIL PROTECTED]> Submissions: drakelist@www.zerobeat.net Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ---------------------------------------------------------------------- ---------------------------------------------------------------------- On Behalf of "K4GM-George" <[EMAIL PROTECTED]> Submissions: drakelist@www.zerobeat.net Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
