开云体育

No need to overthink it for a change. Check the output of that 24v regulator. 0v is no good. I know that there a few experts on here. But the radio is pretty simple.

Lyndon.....you have an HT-45 too! Mine is operational with the original PS, but needs a decent T/R relay setup. I have it positioned to use with my Kenwood hybrid gear. I need to get the T/R setup

Is the radio operating normally otherwise? In the correct band and stable? That will help localize the problem area. 73 -Jim NU0C "Adam W4AJF" <adamf@...> wrote:

If you're talking about an SSR for the L-4, here's an example of a "How-to" http://www.w8zr.net/vintage/amplifiers/Drake%20L4B%20Modification/Drake%20L-4B%20Modification.htm -- *73/Rick* *W4XA * *

Thanks Bob, I am going to resolder the pins first, if no luck I’ll replace that part. Thanks! Adam W4AJF

I would be interested in one of these for my L4 any suggestions? Mike W8flt Thanks in advance

That S meter is so close to useless that it simply does not matter where it rests at zero signal. It simply tells you, “This guy is loud” and “That guy is not loud”. Gary W0DVN

Michael Smith via groups.io writes: Static buildup? Try rubbing the meter face with a "no cling" dryer sheet. --lyndon

In pre-alignment stage, I have a TR-4C with the S-meter indicating 1.5, with power off and chassis in the normal horizontal position. ?Is mechanically zeroing the S-meter possible, and it is

Rick W4XA writes: Oh do tell! I have a Loudenboomer here pining to meet a suitable PSU. I had thought about trying to replicate the original PSU (I even have the 866s!), but re-purposing an existing

The lacquer coating on mine is shot. I was thinking about refinishing it but I don't know how they got that fine finish on the original. 73 -Jim NU0C "K6OXN Bob" <bobk6oxn@...> wrote: -- 73 -Jim

I twiddled my MN2700 knobs several times during the contest. In all seriousness, I used to have several NOS big knobs with a 23 channel dial skirt for the Hy-Gain 623 CB rig. I have not seen them in

I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24cBob KF8IY Any help appreciated, I am hoping someone has figured out how to fix this Specific issue.

Kevin, I am looking for a new skirt or replacement skirt for the RV-75 that I am working on. The knob is identical to the one on a TR-7. The skirt is just that a skirt, it has no function and fits the

Those figures don't indicate a problem. Ideally, TP2, with the preselector detuned, should read -1.35V Your reading isn't terrible. So now we need to see why you're getting S5 with no signal. On the

True statement Jim! Some sort of protection is definitely needed to prevent arcing the power switch on "make" (or break) I'm using a solid state relay to completely eliminate stress on the

@Steve Tonight's numbers :). Cold and detuned TP2=-1.335v 30 mins TP2=-1.267v 60 mins TP2=-1.259v I get your point about " The important part here is if the voltage at TP2 with respect to time." Now

Well that turned into an interesting Contest discussion. Very Cool! Let me hijack myself back to my knob issue Hi Hi. Kevin, Well I found my old knob and of course it had a good knob skirt. I just

Any help appreciated, I am hoping someone has figured out how to fix this Specific issue.

It may be in a location where noise is important. Pentagrid mixers have some advantage in the isolation of the signal and oscillator but they are the noisiest form or mixer. Pentodes have less