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I have a HT-37 on the bench that is complete from recap and alignment.? But I have noticed the fall time on CW is nearly zero; it's well under 1 mS.? Before I start tracking this down and looking

Halden, you are perhaps replying to posts by me and then Jim. You have answered some of my lingering questions ..thank you! It seems to me that old Xtal testers were meant to see it is any good at

I have no clue what the 507 means. I need to clarify, the group in Texas purchased the Name, Pattens and all remaining assets. They were legally Hallicrafters. It went on to a group in Florida and

Hi Walt, My SR-150 has a chassis stamp of "507".? It looks like it might have had more digits after that, but probably not before.? Does this mean the chassis was built by some other company, maybe

This is a continuation of a side-topic from the "SR2000 initial power up" thread. I use a crystal tester for 2 purposes: 1 is to find the approximate frequency at which the crystal will probably

Hi Jim, "I would not rely on a crystal tester to read an exact crystal frequency. " Nor would I.? What matters is whether the crystal oscillates at the desired frequency when installed in the desired

Comments in REDRegards,JimLogic: Method used to arrive at the wrong conclusion, with confidence.? Murphy

Well guys, you started something I know little about so a question or two... What is the “standard circuit” than defines how to establish a crystals frequency to the nth degree of precision ? If

Ok, but the problem still exist with the frequency counter time base.? It must have an minimum frequency accuracy of at least 10 times better then the crystal frequency accuracy that you are trying

Halden, OR, you could connect a frequency counter to TP1 and check all the crystals in operation in the circuit. Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters A majority of acceptance is not

HaldenI would not rely on a crystal tester to read an exact crystal frequency.? The tester circuit itself will influence the crystal frequency.? As you describe it, the crystal is within 0.066% of

You are correct Mike, thanks for the correction. ?My memory isn’t what it used to be. ?hihi 73, -- Paul NV6B

The SR-500 is an upgraded version of the SR-160. The difference is in the PA and the power supply. The 160 is a 100 watt output radio. The 500 is a 300 watt radio. For more information see:

OR, it could be one of the "TEXAS RADIOS". When Northrup/Wilcox fulfilled all the Hallicrafters government contracts they sold the Name and remaining property to a group in Texas. In the property were

I tend to agree with Walt – that the date stamped chassis was probably made on the indicated date but the actual assembly and final check out of a Hallicrafter radio could be later – sometimes

Hi All, where does the SR-500 tx/rx fit into the Hallicrafters line up as there doesn’t seem to be much info out there. Vy 73 Chris G1rpo

Hi Justin, This might be blasphemy, but... http://shop.qrp-labs.com/vfo or a Kenwood VFO-520 and multiply the frequency by 5? I hope to have a QSO with you with me transmitting on my HT-40. Cheers,

Well, my SX-117's original 16.000 MHz crystal was at 15.989420 MHz? on my crystal tester (2N3904 circuit).? While testing some of my other crystals, I found another labelled 16.000 which was at

I have an SR-46A 6M transceiver on the way.? Seems the matching VFO is scarce as chicken-teeth so I'm looking for an alternative.? Any ideas? 73, -- Justin B. KI5GKD

Is the SR2000 can cap an "FP" style twist lock?? ?It does not say in parts list.? Normally I just add a terminal strip but space is limited. C