RE: [drakelist] Heathkit HP-23 PS For Use With Drake Equipt.
Ron Wagner <[EMAIL PROTECTED]> made an utterence to the drakelist gang -- > 300V; it doesn't affect the HV. Without some sort or other of controlling > the HV you'd be putting 800V on the 6JB6 plates, which is higher than the > tubes would want to see. Also, the HP-23 does have a bias pot; perhaps With several windings, it may be possible to "buck" the HV with the 50 or 250 bias supply windings, as well as get your bias. Would need to check the current rating. I do not have the schematics of the voltage doubles in front of me, but you might not be able to do this with the doubler arrangement. Worth a try, if for no other reason then to find out how it all reacts Just a thought. 73, Ron -- Visit my astronomy home page. http://www.dma.org/~wagner Amateur Radio Station: WD8SBB - Ron and KB8NRP - Joann -- On Behalf of Ron Wagner <[EMAIL PROTECTED]> Submissions:[EMAIL PROTECTED] 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/ --
Re: [drakelist] Heathkit HP-23 PS For Use With Drake Equipt.
MIKE BRYCE <[EMAIL PROTECTED]> made an utterence to the drakelist gang -- ok... a bit off topic with the hp23...but here's da poop.. heathkit made several versions of the popular power supply. hp-23 hp-23a hp-23b and hp-23c the hp-23 has an on/off switch, pilot light. your choice of 250 or 300 volts via wiring at assembly time.it also provided both fixed and adjustable bias. fused operation. no 220 ac input the hp23a. has an on off switch with selection of either 250 or 300 volts. No pilot light. both fixed and adjustable bias. circuit breaker replaces fuse, 220 volt option. and your choice of either 6 or 12 volt filaments. the hp-23b. has an on off switch with selection of either 250 or 300 volts. No pilot light. no adjustable bias and no 6 volt filaments. circuit breaker operation and 220 volts wiring the Hp-23c. No on/off switch, or switch selection of B+, you hard wired either 300 or 250 at time of assembly. circuit breaker operation and 220 volt operation. the HP-23a is the most versatile of the series. with the exception of the +800 volt plate voltage, the ac-4 and hp-23 are twins. The circuits are the same for all practical purposes. dropping the plate voltage from +800 to a more acceptable +600 volts would require large bulky resistors. In the end, you would end up throwing away so much energy, the transformer would quickly overheat.. and... still taking orders on the new ac-4r replacement pcb for the drake ac-4 supply. Mike Bryce, WB8VGE SunLight Energy Systems http://www.seslogic.com http://www.theheathkitshop.com -- On Behalf of MIKE BRYCE <[EMAIL PROTECTED]> Submissions:[EMAIL PROTECTED] 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/ --
RE: [drakelist] Heathkit HP-23 PS For Use With Drake Equipt.
"Jim DiMauro" <[EMAIL PROTECTED]> made an utterence to the drakelist gang -- Hi Tim: The selectable voltage on the HP-23 (which is internal on my supply, not a switch) controls only the PA screen voltage, selectable between 250V and 300V; it doesn't affect the HV. Without some sort or other of controlling the HV you'd be putting 800V on the 6JB6 plates, which is higher than the tubes would want to see. Also, the HP-23 does have a bias pot; perhaps yours is a different version? Thanx & 73, Jim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tim Kass Sent: Wednesday, May 26, 2004 9:27 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: [drakelist] Heathkit HP-23 PS For Use With Drake Equipt. Yes, I've done that several times, the HP-23 has a switch on the side for 2 voltages ranges for the HV so I never bothered putting in a dropping reistors, but you will have to add a bias pot to the HP-23 to adjust the bias for the Drake transmitter, this is easily done on the under side and I stick it out the side of the HP-23the Heaths adjust their bias at the radio side...hope this helps...73 Tim K8WBL >From: "Jim DiMauro" <[EMAIL PROTECTED]> >Reply-To: <[EMAIL PROTECTED]> >To: "Drake List" <[EMAIL PROTECTED]> >Subject: [drakelist] Heathkit HP-23 PS For Use With Drake Equipt. >Date: Wed, 26 May 2004 15:36:35 -0400 > > >Hi All: > >I have a Heathkit HP-23 supply that I want to use as a substitute for the >AC-4. Other than dropping the HV from 800 VDC to 650 VDC, are there any >considerations I should know about? I plan to simply use a dropping >resistor in series with the 800 VDC line. Is there a better way? Anyone >out there using the HP-23? > >Jim >WA2MER > >-- >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/ >-- No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced. _ FREE pop-up blocking with the new MSN Toolbar get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ -- 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/ -- -- On Behalf of "Jim DiMauro" <[EMAIL PROTECTED]> Submissions:[EMAIL PROTECTED] 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/ --
RE: [drakelist] Heathkit HP-23 PS For Use With Drake Equipt.
Yes, I've done that several times, the HP-23 has a switch on the side for 2 voltages ranges for the HV so I never bothered putting in a dropping reistors, but you will have to add a bias pot to the HP-23 to adjust the bias for the Drake transmitter, this is easily done on the under side and I stick it out the side of the HP-23the Heaths adjust their bias at the radio side...hope this helps...73 Tim K8WBL From: "Jim DiMauro" <[EMAIL PROTECTED]> Reply-To: <[EMAIL PROTECTED]> To: "Drake List" <[EMAIL PROTECTED]> Subject: [drakelist] Heathkit HP-23 PS For Use With Drake Equipt. Date: Wed, 26 May 2004 15:36:35 -0400 Hi All: I have a Heathkit HP-23 supply that I want to use as a substitute for the AC-4. Other than dropping the HV from 800 VDC to 650 VDC, are there any considerations I should know about? I plan to simply use a dropping resistor in series with the 800 VDC line. Is there a better way? Anyone out there using the HP-23? Jim WA2MER -- 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/ -- No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced. _ FREE pop-up blocking with the new MSN Toolbar get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ -- 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] Heathkit HP-23 PS For Use With Drake Equipt.
Jim, before you go too far with this, there's a fellow on the newsgroups that wants to swap an AC-4 for an HP-23! "Dave McCombs <[EMAIL PROTECTED]> Dave McCombs wrote: > Have a very nice AC-4 supply in the cover that I want to swap even for a > Heathkit HP-23 (A,B, or C) Would like the HP-23 to have the top cover also, > but I'm open. > > " I have no connection with Mr McCombs whatsoever, just happened to see this on r.r.a.boatanchors. GL. regards, Mahlon - K4OQ Mahlon Haunschild wrote: Well three thoughts come to mind: - The resistor won't do your HV voltage regulation any good. - Despite the resistor, the HV will rise to circa 750 VDC during SSB voice waveform valleys, which will be difficult to set the bias for - The HP-23 doesn't have enough current capacity for a TR-any, if that's what you had in mind. regards, Mahlon - K4OQ Jim DiMauro wrote: Hi All: I have a Heathkit HP-23 supply that I want to use as a substitute for the AC-4. Other than dropping the HV from 800 VDC to 650 VDC, are there any considerations I should know about? I plan to simply use a dropping resistor in series with the 800 VDC line. Is there a better way? Anyone out there using the HP-23? Jim WA2MER -- 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] Heathkit HP-23 PS For Use With Drake Equipt.
Well three thoughts come to mind: - The resistor won't do your HV voltage regulation any good. - Despite the resistor, the HV will rise to circa 750 VDC during SSB voice waveform valleys, which will be difficult to set the bias for - The HP-23 doesn't have enough current capacity for a TR-any, if that's what you had in mind. regards, Mahlon - K4OQ Jim DiMauro wrote: Hi All: I have a Heathkit HP-23 supply that I want to use as a substitute for the AC-4. Other than dropping the HV from 800 VDC to 650 VDC, are there any considerations I should know about? I plan to simply use a dropping resistor in series with the 800 VDC line. Is there a better way? Anyone out there using the HP-23? Jim WA2MER -- 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/ --
