Yeah, I meant the current regulator. Shipboard power in the 30's wasnt exactly stable.
A simple converter to take 160 and 80 down to the RAK's best tuning ratio band would be an interesting experiment. Carl KM1H ----- Original Message ----- From: "Bill Cromwell" <[email protected]> To: "ZR" <[email protected]> Cc: "Thomas" <[email protected]>; <[email protected]>; <[email protected]> Sent: Sunday, May 20, 2012 10:01 AM Subject: Re: Topband: staying up with the latest technology, receiver evaluation > On Sun, 2012-05-20 at 08:46 -0400, ZR wrote: >> The RAK and RAL are arguably the best regen ever manufactured. There was >> a >> pair of them in Emergency Radio aboard a USN tanker I spent a few years >> on >> in the 60's and I used them often to keep my code speed up by copying >> numbers groups. >> >> Ive a RAK-7/RAL-7 pair here the past few years and have been using the >> RAL >> more often with the pre WW2 QRP station with the TX being a Meissner >> Signal >> Shifter VFO with plug in coils. >> >> While the RAK is a better CW radio due to a sharper audio filter its only >> goes to 600KHz. I havent made any mods to the RAL yet but I might add an >> outboard brick wall audio filter. >> >> The audio AVC, actually a limiter, works wonders in T storm static. >> >> These are not light, the radio is 74# and the outboard PS 41#. Remove the >> regulator tube from the PS for a big power savings and heat drop. Its not >> needed on a home mains. >> >> Carl >> KM1H > > Hi, > > The RAK 7 that I have certainly changed my mind about regens! I got it > in the 80s to look at LORAN signals not knowing it was a regen until I > got it home. Then that big "Regeneration" control became a clue <grin>. > I was amazed. I did get to examine the LORAN signals on an old, slow > o'scope. I have been looking for a RAL lately to put together the "RCA > Twins". I have been thinking of trying to clone a RAK/RAL set. Not to > make any improvements. Just to see if I can even get close to the real > deal in performance. A lot went into those. > > I looked in the manual to be sure but there is a voltage regulator and a > current regulator in the power supply. It's the current regulator that > is the big power hog. The radio needs 60 watts without it and 200 watts > with it. Mine has been without the current hog..er... regulator since > some time before I got it. Mine will never see naval service again! > > 73, > > Bill KU8H > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1424 / Virus Database: 2425/5011 - Release Date: 05/20/12 > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
