Buy this instead:
Look around, they can be had for less than $10.00; 12 V in 40-390 out, regulated at up to 100 mA, there is also a bipolar version (not much use here).
There are also cheap little DC-DC boost converters that will give you 24VDC from 12VDC in. eBay and Amazon are your friend here. BTW, I have found that little filtering is necessary, but when it is, a simple capacitive filter usually does the trick.
I use these things in profusion and have even hacked the transformers and feedback resistor to produce different current/voltage combinations.
Scott W7SVJ
From: J Mcvey <[email protected]>
Sent: Saturday, April 29, 2023 10:13
To: [email protected]; [email protected]; [email protected]
Cc: [email protected]
Subject: Re: [ARC5] R-508/ARC Conversion
You can probably use the same idea as was posted here a week ago about simply using a 12v transformer for the heaters and use a voltage multiplier stack to get to 150 volts or so.
I'm going to build the 24v version and try it on an arc5 receiver. I like the simplicity of it.
The radio will work ok with reduced voltage if the ground is removed from the screen grid voltage divider and allowed to float higher.
I suspect the voltage divider design may be similar on the R508.
BTW, I tried running an ARC 5 with the modified screen divider on 24 volts plate and it worked-poorly. The radio received , but there wasn't enough power to produce good audio output levels.
On Saturday, April 29, 2023 at 12:55:34 PM EDT, <[email protected]> wrote:
Not much to dop to convert it, give it power, put a tuning crank on it, and
a speaker, and you are good to go.
N6CC has sufficient info on his website to get you going:
n6cc.comm/type-12-am-aircraft-system/
Scott W7SVJ
-----Original Message-----
From: [email protected] <[email protected]> On Behalf
Of [email protected]
Sent: Saturday, April 29, 2023 09:09
To: [email protected]
Cc: [email protected]
Subject: [ARC5] R-508/ARC Conversion
Greetings All,
Has anyone converted an R-508/ARC using the article in the June
1965 issue of 73 Magazine ?. I would like to get this old girl running so I
can listen in on out local airport Automated weather transmissions.
Jeff N2LXM
Amateur Radio Operator
American
Patriot
Proud Father of Two US Marines
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