ad: w5yi


Discussion in 'Ham Radio Discussions' started by W4JJA, Dec 21, 2013.

Thread Status:
Not open for further replies.
ad: L-HROutlet
ad: l-rl
ad: Left-2
ad: Subscribe
ad: OK1UUad-1
ad: Left-3
ad: L-MFJ
ad: FBNews-1
  1. WN2SQC

    WN2SQC Ham Member QRZ Page

    In the 60's I had a Bogen public address audio amp that used a pair of 807's.
  2. K8JD

    K8JD Ham Member QRZ Page

    The first homebrew rig I buit had a 6AG7 osc and an 807 PA. It didn't work so I built a single 6AQ5 and it did.
    I used old parts salvaged from discarded radios and TVs.
    When I got my General ticket I had a WW2 surplus ARC5 that had the 12 Volt version 1625 tubes in it (and a VFO).
    My first "made-for-hams" rig was a Globe Cheif 90 and it had an 807 final.
  3. K9STH

    K9STH Platinum Subscriber Volunteer Moderator Platinum Subscriber QRZ Page


    Actually, the WRL Globe Chief 90, like the Globe Chief 90A, had a pair of 807s in the final. The only differences in the transmitters was that the Globe Chief 90A had a "shadow cabinet" in that the top of the cabinet overhangs about 0.5-inches instead of being flush with the panel and the later versions of the 90A had a plastic housed moving vane meter instead of the metal housed moving vane meter.

    The circuitry of the transmitters is very simple, a 6AG7 oscillator into a pair of 807s in the final. The finals double for 10-meter operation which reduces the power quite a bit.

    The 90 and 90A have 160-meters whereas the "Globe Chief Deluxe" dropped the 160-meter position as well as having a completely different cabinet. But, the basic circuit was still the same.

    Glen, K9STH
  4. WA9SVD

    WA9SVD Ham Member QRZ Page

    I had a 6 Meter amp that used 1625's back in the late 60's. They were essentially 807's, but besides the 12 Volt filament, they used a different base, so they weren't directly interchangeable. Mil Surplus 1625's from WWII/Korean conflict era were about $0.50 each, far cheaper than 807's.
  5. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    Only 807 rig I've ever owned was a Johnson Adventurer.

    Not a bad CW rig, but that panel meter! It bounced and bounced and bounced. Thankfully to tune up I had an outboard SWR meter and I'd just tune for maximum forward power, because if I waited for the Adventurer meter to settle down to "dip the plate current," that would have taken more time than I had the patience for.

    I don't think I've ever had any other rig using an 807.

    Never homebrewed anything with one, either. This is a tube that's quite a lot older than I am, and they were still "cheap" in the mid-60s when I got licensed and started homebrewing stuff, so was the 6146 which is a somewhat better tube.

    1625s were $0.25/each new in boxes on Radio Row in NYC (WW2 surplus stuff), but I didn't use any of those, either.

    1625 wasn't just an 807 with a different filament, there was an internal connection that made them not usable for GG service, but it's been so long I forgot what the fix was for that. I do recall there was some sort of fix and it was published in magazines in the 50s. Should go look that up when I have nothing to do, which is never.:p
  6. N2EY

    N2EY Premium Subscriber QRZ Page

    I use a rig with 807s. Today - and it's not a nostalgia rig nor a retro thing. It's my main HF transceiver, the latest in a long line of homebrew rigs going back 46 years.

    The rig I use today was built in the mid-1990s and uses a pair of 807s in the final at full ICAS Class C ratings. 150 watts DC input, about 100 watts RF output. It is a CW-only, all-hollow-state transceiver of original design. Picture on my profile page.

    Its immediate predecessor was a similar CW transceiver built in the early 1980s, using the same heterodyne scheme as the Heath SB rigs. Pair of 807s in that one too.

    Before that, (late 1970s) I had a separate transmitter-receiver setup with VFO/6AG7-2x807. Before that, a simple MOPA rig running a single 807 at 40 watts. In the early 1970s, some rigs using 1625s (807 with 12 volt heater and 7 pin Medium base). The very first rig I had with an 807 was the Johnson Viking Adventurer.

    I've had other rigs - manufactured, kit, surplus, restorations, and homebrew. But my 807/1625 rigs outnumber them all.

    If you work me on the air, you're almost certainly hearing the rig in the pictures.
  7. KA4DPO

    KA4DPO Platinum Subscriber Platinum Subscriber QRZ Page

    I almost forgot about those. My Johnson Ranger uses a pair of 1625's in the modulator. I recall when they were like you said, really inexpensive. Not any more. A pair of 1625's can set you back $50.00 or more.

    Even 807's are no longer cheap, lucky for me I have four brand new ones so I guess I'm pretty well set for those.
  8. M0SVB

    M0SVB Ham Member QRZ Page

    My Elizabethan uses two 807's, and when I finally get around to building it, the 75W modulator will use another two. I've still got 5 or 6 good RCA 807's I bought in the 1960's.
  9. SM0AOM

    SM0AOM Ham Member QRZ Page

    My "shack" contains five transmitters with 807's, one Geloso G210TR CW/AM using the quite common 4/101 VFO,
    one VFO-Buffer-Driver-PA with 2x807 in the PA, one CO-PA with a single 807, one CO-PA with 2x807 and finally one Geloso VFO 4/102-based CW/AM with 2x807 in the PA stage and 2x807 in the modulator.

    The ARC-5 transmitters using 2x1625 are not counted here.

    Some dumpster diving at a previous employer netted a lifetime supply of spare 807's

  10. WA8ZYT

    WA8ZYT Ham Member QRZ Page

    Steve, I remember that mod. We used to have a GG amp at our high school radio club, that used 8-1625's. I remember the tube base was ground out with a wheel grinder, and wire was lifted and re soldered, if I remember correctly. That was over 45 years ago, I am surprised I remember that!
Thread Status:
Not open for further replies.

Share This Page