- #Hammarlund super pro manuals#
- #Hammarlund super pro pro#
- #Hammarlund super pro series#
- #Hammarlund super pro free#
#Hammarlund super pro pro#
Even in these days of digital readout, ten tons of bells and whistles, do everything for you receivers, the old Super Pro has a definite place in the ham shack. Hammarlund designed and built a warhorse that really fits the (much overused and abused) title "Classic". THAT in itself should tell you SOMETHING. I still have two of them, and still regret giving up the other two. In the past 25 years I've owned four of these beasts. Just didn't have the direct frequency readout.
#Hammarlund super pro series#
Hear anything the R-388 or R-390 series could Monitor receivers were NC400 - not near the After military,įBI communications stations, and there theĬrystal positions were in use. Hundred SP600's in the consoles stretching from Most part in the Air Force Security Service, noĬrystals as they were a general search receiverĪnd the ability to roll onto a frequency rapidly On RTTY, they were crystal controlled but for the One could get it pretty close to the desiredįrequency by using the logging scale. Very littleĭrift, and stable like a rock once on frequency. You're correct in that the SP600 is a great They are excellent performers to this day and depending on antenna will pretty much tune any AM signal out there for shortwave listeners/DXers. If you have room for a Hammarlund SP-600 and can find one that hasn't been hacked half to death these radios are well worth restoration and maintenance. I'm certainly not alone in this evaluation. All have their strengths, weaknesses and quirks but I consider the SP-600 and the R-390A the best US tube-type communications receivers of the 1950-60's. I have other Hammarlund Super Pro and HQ series receivers and a Capehart contract R-390A. Who knows? Maybe I can even squeeze out a little more sensitivity, too.
#Hammarlund super pro manuals#
I have the instruments and manuals ready for this delicate job and look forward doing it later in the winter. There are no marks on the tuning turret alignment access covers so this radio may have the factory alignment intact. As much as I like the way the SP-600 performs right now I know from observing the dial calibration that it could use an alignment. Once in a great while the 909X will do a better job on a noisy signal (DSP is a great thing) but the SP-600 usually runs circles around any portable. I often keep a Sangean ATS-909X nearby for quick frequency spotting.
#Hammarlund super pro free#
The radio is pretty much free of frequency drift after about 45 minutes of warm-up time. I open up the 8 kHz selectivity position on strong stations and the sound from the old Jensen 10" is to die for. The flywheel assisted tuning mechanism must be tried to be fully appreciated. The SP-600 can tune across the bands relatively quickly for a 1950's radio. I am a longtime SWL and use it with a simple outdoor 106' random wire/longwire antenna. All of the tubes tested and substituted good. I gave the radio a careful cleaning including all switches and contacts and lightly lubed all shaft bearings. Two weeks later both problems were eliminated with five capacitor replacements. I turned the radio off, left it off, and ordered capacitors. Yes, the AGC problem was still there and AC hum was present in the audio. I hooked it up to a vintage Jensen 10" speaker with matching transformer to the 600 ohm audio out. I fired the SP-600 up for the first time in decades by using a variac. The radio features the metal (not paper) faced Marion Electric meter and the black dial escutcheons are the later type with no fasteners visible from the front. This is a very nice SP-600 in excellent cosmetic condition. 191XX) means that the dreaded black beauty molded capacitors were never installed and that ceramic disc capacitors were used instead. In addition, the fairly late date of production (serial no. The XTAL calibrator also brought the tube count up from the typical 20 to 21. It turns out that this JX-21 was built in 1956 (date on original filter cap can) or 1957 (a factory installed Hammarlund XC-100 100 kHz crystal calibrator is present). This summer I hefted the SP-600 out of storage and took a good look at it. Then I had a long career and raised a family. I mothballed the radio and put it in storage. I used it for a few years but had AGC issues with it. Back then tube gear was getting unloaded for a song.
I purchased a lightly used Hammarlund SP-600 JX-21 in the early 1980's from a local military/government surplus electronics store in California.
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