Re: SR-150 and SR-160 QRO modifications
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Last year I turned the rig on and the band sounded in really poor shape but there was a station calling CQ and I answered and worked him. Afterwards I realized why the band was quiet. I was on the dummy load and the other station was about 1500 miles away! Who needs QRO??
73 Don ve3ids?
On Mon., Feb. 24, 2025, 6:50 p.m. edward schumacher via , <eddiewa9gqk= [email protected]> wrote:
And for proof of the power theory (fact) I just completed a cw Q to Wake Island over the weekend accidentally driving my Acom 1500 which was till tuned for 15M while having the K4 set for 100W drive on 12M. Made the contact in one call and then noticed I had not thrown my antenna switches to go 'round the amp. My forward power with this mixup was 3W.
Confirmed this by going up freq and keying and sure enough, my inline wattmeter was barely moving attesting to genuine QRP. I received a 559 from Wake.
The lesson, don't need to burn the rig for a few more watts.
Ed, WA9GQK
On Monday, February 24, 2025 at 03:40:49 PM CST, Rick W7IMM via <myr748= [email protected]> wrote:
On Mon, Feb 24, 2025 at 06:53 AM, waltcates wrote:
We shouldn't loose sight of the original topic, which was the use of the 6DQ5 in place of?the 8236.
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Walt Cates, WD0GOF
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A majority of acceptance is not proof of correctness.
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I would tend to agree.
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If I am not mistaken,? the SR 500 in good repair and alignment would presumably do somewhere around 250-275W PEP output based on operating it at 500W PEP input.
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My HT44 with the stock PS-150-120 seems to work well at about 150W PEP output.
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The difference between 150w (approx 52dBm) and 275W (54.4dBm) is not even 3dB total making it an essentially un-detectable difference on the other end.
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And even if you're going from 100W to 300W (50-54.8dBm) it's less than a 5dB difference, which is also not very significant on the other end.? To me, it doesn't really seem worth it to "butcher" the radio to make it happen.?
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Most of the fun I have using my HT44, HT32B and? SR400 (and even the HT33 Mk I, HT45 Mark IIA)? is the simple joy of operation in good band conditions.? When I mention I am using them, it generates all sorts of fun conversation about them vs how strong the signal is!
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73/Rick
W7IMM
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Don VE3IDS